I

The coastal region of Tanga, located in north-eastern Tanzania, has long been a site of vibrant cultural exchange, economic interaction, and social transformation. Derived from the Swahili word for ‘sail’ or the Bondei term for ‘farm’, Tanga’s name reflects its historical significance as a protected bay offering a safe haven for local fishers and a key node in the Indian Ocean trade networks.Footnote ¹ The area’s Indigenous ethnic core included ancestors of the Shambaa (Sambaa), Bondei, Zigua (Zigula), Digo, Nguu (Ngulu), Segeju, Pare, Doe (Wadoe), Mbugu,Footnote ² Dhaiso, and Duruma. These groups, primarily agriculturalists, leveraged the region’s fertile soils and coastal proximity for farming crops like bananas, millet, sorghum, cassava, and rice, while engaging in fishing and trade.Footnote ³

In the pre-colonial era, Tanga cultural norms positioned women as the property of their husbands, enforcing strict monogamy for women while permitting polygamy for men. This gendered hierarchy gave rise to the belief in usinga, a lethal curse feared to strike men who pursued local married women,Footnote ⁴ serving as a cultural deterrent against sexual transgressions and reinforcing women’s fidelity as a communal value. Women secured husbands’ loyalty, as failure to do so risked men seeking other partners in polygamous arrangements.Footnote ⁵ When such devotion resulted in profound attachment, communities often attributed it to limbwata, a form of seductive witchcraft supposedly used by Tanga women to bind men emotionally and financially.Footnote ⁶

Colonial presence in Tanga, which began in the late 1880s as part of Germany’s broader efforts to expand its influence in Africa, reinforced these moral orders. In 1893, Dr Richard Hindorf, a German agronomist, established the first sisal plantation, laying the foundation for a global export industry.Footnote ⁷ Under British mandate rule from 1919, sisal production turned Tanga into an important economic hub, reaching its peak in 1963–4. At its height, the industry employed between 30 per cent and 35 per cent of the country’s wage labour force and earned Tanga’s sisal the title ‘Tanzania’s white gold’.Footnote ⁸ Many of the labourers were unmarried men from Kigoma, Iringa, and Burundi, creating a distinctly male-dominatedFootnote ⁹ environment in Tanga’s sisal plantations, which further reinforced beliefs of usinga and limbwata.

Within this plantation economy, women’s roles were primarily domestic, supporting their families and maintaining households amid economic shifts.Footnote ¹⁰ Usinga and limbwata persisted as powerful cultural mechanisms, regulating labour migration, sexual morality, and household formation. Drawing on oral testimonies from former labourers, colonial records, and scholarly works, this article reinterprets these beliefs as dynamic frameworks that reveal the agency of both men and women in navigating moral, emotional, and economic settings between the 1920s and the 1960s in Tanga’s sisal plantations.

This article combines archival research with oral history interviews to reconstruct the social and emotional worlds of sisal plantation communities in Tanga. The oral history fieldwork took place in May 2025 in several former plantation areas, involving mainly elderly participants aged sixty years and above who had direct experience of plantation life or grew up in communities linked to sisal estates in the mid-twentieth century. Their testimonies offer key insights into everyday life, beliefs, and social relations that are largely absent from colonial records. Before fieldwork, the researcher obtained research clearance from the home institution and secured authorization from the Tanga Regional Administrative Office. In the field, the researcher worked with village and neighbourhood chairpersons to identify knowledgeable elders, who received information about the study and facilitated introductions to willing participants, helping to build trust and gather community perspectives on migration, gender relations, and belief systems surrounding usinga and limbwata.

II

The historiography of Africa has undergone a deep intellectual transformation since the mid-twentieth century, moving from colonial narratives grounded in European rationalism to more complex, decolonized understandings of African knowledge systems. Early colonial and missionary historians treated the region’s cultures as static and primitive, viewing Indigenous spiritual beliefs as superstitions obstructing the progress of modernization.Footnote ¹¹ Within such frameworks, cosmological concepts like usinga and limbwata, which are central to moral and emotional life in Tanga and the broader Swahili coast, were reduced to curiosities rather than analysed as meaningful systems of thought. The colonial archive through labour reports, ethnographic surveys, and administrative memos portrayed these beliefs as vestiges of ‘pre-scientific’ mentalities, echoing what V. Y. Mudimbe later described as the epistemological colonization of African thought.Footnote ¹²

By the 1950s and 1960s, a new wave of African nationalist and Marxist historiography sought to reclaim African agency. Historians such as Terence Ranger and Walter Rodney reinterpreted Africa’s past through the lenses of resistance and underdevelopment,Footnote ¹³ shifting the focus from European actors to African responses. In Tanzania, John Iliffe, Kapepwa Tambila, Anse Tambila, Laurent Sago, and Hanan Sabea made a major advance in reconstructing the social and economic evolution of the region. Their attention to labour migration, taxation, and the sisal plantation economy of Tanga illuminated the structural foundations of colonial capitalism.Footnote ¹⁴ Likewise, Frederick Cooper’s influential study of African labour demonstrated how colonial capitalism shaped workers’ experiences and identities through labour relations and economic structures. Yet these approaches remained largely bound to a materialist paradigm that privileged economic rationality over cosmological consciousness.Footnote ¹⁵ These scholars successfully exposed the mechanisms of exploitation but failed to interrogate how beliefs such as usinga and limbwata mediated everyday relations of power, sexuality, and emotion among workers. Their silences reveal what Sylvia Wynter later described as the ‘coloniality of knowledge’, the habit of subordinating Indigenous reasoning to Western categories of explanation.Footnote ¹⁶

The late 1970s and 1980s witnessed a methodological and theoretical shift towards cultural history and historical anthropology. Steven Feierman revolutionized African historiography by treating local healers, diviners, and moral thinkers as producers of knowledge rather than subjects with ethnographic curiosity. In regions near Tanga, Feierman demonstrated that intellectual traditions embedded in spiritual beliefs were adaptive mechanisms for managing social instability, illness, and moral conflict.Footnote ¹⁷ His approach reintroduced cosmology into history, portraying concepts like usinga and limbwata not as magical residues but as rational, evolving responses to historical change. In theoretical terms, Feierman’s work aligned with E. P. Thompson’s notion of the moral economy, an interpretive frameFootnote ¹⁸ later refined by James C. Scott, which emphasizes how non-institutional moral codes govern behaviour and resistance in contexts of oppression.Footnote ¹⁹ Within this paradigm, usinga and limbwata appear as informal moral economies that disciplined conduct and regulated intimacy in the absence of formal colonial justice.

Parallel to the anthropological turn, ethnographers such as John Middleton and David Parkin enriched the understanding of Swahili and coastal spirituality. However, their analyses often reified these practices as timeless cultural patterns, illuminating symbolic orders but neglecting the historical specificity of plantation society.Footnote ²⁰ By situating Tanga’s beliefs within a dynamic labour environment, one perceives how cosmology was not static folklore but an interpretive practice shaped by the moral and emotional crises of migrant life. Theoretical insights from Jean and John Comaroff become invaluable here. In their seminal works, the Comaroffs argued that cultural practices such as rituals, beliefs, and cosmology are not static or timeless but are deeply shaped by historical, economic, and social contexts. They emphasize that local cosmologies often mediate experiences of structural inequality and social upheaval, especially in settings marked by exploitation, colonial influence, or migratory labour.Footnote ²¹ Applied to the Tanga context, the sisal plantations created a migrant labour environment with profound social and emotional stresses. Beliefs such as usinga and limbwata were not merely inherited traditions but interpretive tools through which workers and women made sense of economic pressures, gendered power relations, and moral crises. These spiritual practices reflect how people experience and respond to colonial-capitalist conditions rather than being timeless folklore. The Comaroffs’ work underscores that symbolic systems and rituals are intertwined with historical and political processes. Studying them without historical specificity risks misrepresenting them as timeless or static practices.

Feminist historiography from the 1990s onward deepened this discussion by centring gender, embodiment, and spirituality in the analysis of African societies. Lynn Thomas and Oyeronke Oyewumi challenged both colonial and secular feminist frameworks that ignored Indigenous gender epistemologies. Their works opened an interpretive space for understanding female agency not merely in political or economic terms but also through ritual, emotion, and bodily knowledge.Footnote ²² In this light, limbwata emerges as an idiom of feminine power that transformed emotional labour into a form of socio-economic strategy. Yet even feminist historians like Susan Geiger and Marcia Wright, while reclaiming Tanzanian women’s political subjectivity, retained a secular bias that excluded the supernatural as an analytical category.Footnote ²³ Oyewumi argued that ignoring the supernatural in studies of African societies reflects a Western habit of separating the spiritual from the material. This approach makes it harder to understand how African women exercised power and authority because their influence often operated through spiritual, ritual, and cosmological practices, not just through politics or economics.Footnote ²⁴ In other words, understanding women’s agency requires recognizing how spiritual beliefs and practical strategies were deeply intertwined in their efforts to navigate the social, economic, and emotional realities of everyday life.

In The comforts of home, Luise White demonstrated that relationships between migrant men and urban women could not be reduced to prostitution or economic opportunism; rather, they were complex social arrangements through which migrants recreated ideas of family, belonging, and emotional security in unfamiliar environments.Footnote ²⁵ Similar processes were evident in Tanga’s sisal plantations. Relationships interpreted locally through the language of limbwata often reflected companionship, domestic stability, and emotional dependence rather than supernatural manipulation. White’s work therefore helps explain why migrant labourers invested economically and emotionally in coastal households, while local communities interpreted these attachments through culturally meaningful belief.

The turn of the twenty-first century introduced explicitly decolonial and post-colonial critiques that reconnected the historical study of belief with broader theories of modernity and power.Footnote ²⁶ Scholars such as Peter Geschiere and Rosalind Shaw demonstrated that witchcraft discourses in Africa were not residues of the past,Footnote ²⁷ but mirrors of the tensions of capitalist globalization of what Geschiere termed ‘occult economies’.Footnote ²⁸ For example, in Tanga’s sisal plantations, female charms like limbwata can be considered part of an occult economy because they transformed emotional or spiritual influence into social or economic power. These frameworks help explain why usinga and limbwata retained potency in Tanga’s plantation zones: they encapsulated fears and aspirations caused by new monetary and gendered dependencies. The Comaroffs’ concept of ‘moral economies of modernity’ further illuminates this dynamic by situating belief as a theory of moral exchange in rapidly commoditized societies.Footnote ²⁹ Thus, rather than treating usinga and limbwata as irrational, one can interpret them as historical languages of critique vernacular theories through which Africans interpreted the ambiguities of love, labour, and wealth under colonial capitalism.

Scholars such as George Lock and Lawrence Mbogoni have extended their analysis of plantation economies to include environmental dimensions, yet they continue to marginalize cosmological frameworks.Footnote ³⁰ Recent oral history initiatives like Hidden histories of Tanzania (2021) and The Tanzania memory project (2023) reveal the persistence of such beliefs in popular memory, though their interpretations often remain disconnected from structural analysis.Footnote ³¹ Bridging this gap requires methodological pluralism that integrates archival, oral, and theoretical perspectives, a synthesis advocated by historians such as Karin Barber, who argued for treating oral genres and belief narratives as historical texts,Footnote ³² and Mahmood Mamdani, who exposed the colonial division that separated the customary and modern spheres of life.Footnote ³³

From a theoretical standpoint, the integration of historical anthropology, feminist epistemology, and post-colonial critique enables a re-reading of usinga and limbwata as dynamic forms of moral governance and epistemic resistance. They functioned both as tools of conformity and as ‘weapons of the weak’,Footnote ³⁴ embodying social commentary on inequities of gender, labour, and intimacy. These beliefs did not merely reflect anxiety; they produced social order, mediated emotional economies, and challenged the boundaries of colonial legality. In Wynter’s terms, they articulate alternative ‘genres of the human’ that disrupt Eurocentric notions of rationality and agency.Footnote ³⁵ Consequently, a decolonized historiography of Tanga must move beyond economic, political, and environmental determinism to recognize the cosmological imagination as part of historical causation. The challenge that remains is methodological: to historicize usinga and limbwata not as isolated superstitions but as integral records of social thought. In doing so, this article bridges the divide between the rational and the spiritual, recovering in full the intellectual landscapes through which Africans in Tanga made sense of love, labour, and life under the long shadows of colonial modernity.

III

In the cultural history of the Swahili coast, limbwata refers to the condition of being bound emotionally, spiritually, and materially by a woman’s influence. The term derives from Swahili words implying ‘binding’ or ‘entrapment’, and historically it has described a man’s intense and seemingly uncontrollable attachment to a woman, often explained through the language of magic or bewitchment. Within the cosmological imagination of the coast, this idea carried multiple meanings. It could refer to ritual enchantment through charms or potions; to culinary mastery, in which a woman’s food symbolically ‘captured’ a man’s loyalty; to emotional nurture that created deep attachment; or to the symbolic discourse through which men articulated their loss of control in changing social and economic worlds. Far from being static superstition, limbwata evolved as a historical idiom and an expressive way to make sense of the emotional and moral transformations produced by migration, labour, and gendered economies.

The roots of this belief reach back to the pre-colonial eraFootnote ³⁶ to the colonial transformation of Tanga under German rule from the 1890s to the First World War. The introduction of sisal in Tanga inaugurated an export-oriented plantation economy that reshaped the north-eastern coast.Footnote ³⁷ German administrators, seeking to discipline African labour, imposed coercive recruitment systems and legal controls, such as the Masters and Servants Ordinance of 1909Footnote ³⁸ and 1923.Footnote ³⁹ Thousands of African men from inland groups Hehe, Ha, Makonde, Sukuma, Fipa, Nyamwezi, Urundi, and othersFootnote ⁴⁰ were drawn into the plantations as unfree or semi-coerced workers. The colonial labour regime deliberately recruited bachelors, minimizing the costs of family housing and reproducing a workforce severed from its social roots.Footnote ⁴¹ The isolation and regimentation of estate life disrupted the moral fabric of kinship, generating new anxieties about sexuality, dependence, and masculinity.Footnote ⁴² Though limbwata as a term was not yet prominent in the archival record, the conditions that gave it meaning were already in place: male dislocation, longing for intimacy, and fear of female influence in a world where labour and emotion were both subject to control.

These dynamics deepened under the British mandate after 1919, when Tanganyika became a League of Nations territory and Tanga emerged as the hub of East Africa’s sisal industry. By the 1960s, production exceeded 233,500 tons and 73 estates were active in the region.Footnote ⁴³ The boom relied heavily on migrant workers from western and southern Tanzania, who came to the coast under contracts that were nominally voluntary but structured by deep inequalities. Most arrived as single men hoping to earn temporary wages for survivalFootnote ⁴⁴ or land purchases back home.Footnote ⁴⁵ On the plantations, however, they encountered low pay, exhausting physical work, and strict discipline. Cutting thorny sisal leaves, operating heavy decortication machinery, and hauling bundles under the supervision of overseers left workers fatigued, injured, and often malnourished.Footnote ⁴⁶ Wages in the 1950s rarely exceeded 100 shillings per month, barely enough for subsistence. The British Kipande (card) pass system, inherited from colonial coercion, further restricted their mobility by requiring African workers to carry identification documents that recorded their employment history and movements.Footnote ⁴⁷

In this harsh environment, the idea of limbwata took on a vivid life. Men who developed intimate relationships with local coastal women found themselves stigmatized by peers who accused them of being ‘caught’ or ‘tied’. To explain why some men abandoned their plans to return home, redirected remittances towards new households, or lost motivation for savings, plantation communities evoked the notion of enchantment. One former worker, Lazaro, captured this sentiment when he recalled: ‘You would come to Tanga to look for money. You would meet a woman who cooks well, speaks softly, and treats you like a king. Before you know it, you’re building her a house. Then you forget your home.’Footnote ⁴⁸ For many men, such experiences were interpreted not as emotional choice but as loss of autonomy through supernatural binding.Footnote ⁴⁹

The colonial labour system was designed to extract maximum productivity while denying workers the means of social reproduction. Migrant men lived in barracks separated from kin and were subject to taxation that compelled continued service.Footnote ⁵⁰ Emotional attachments to local women, therefore, offered comfort, care, and stability within an otherwise hostile world. Yet the same colonial gender ideology that defined male labour as rational and disciplined recast these attachments as evidence of moral decay.Footnote ⁵¹ The idiom of limbwata thus rationalized contradictions between men’s lived emotional needs and the patriarchal expectations of autonomy and control. In anthropological terms, it functioned as what Jean and John Comaroff call a ‘social technology’ of explanation: an occult discourse that arises in moments of economic and moral uncertainty to make sense of disempowerment.Footnote ⁵²

To local women, however, the accusation of limbwata often concealed the real nature of their labour. Oral testimonies from Tanga’s elders emphasize that what outsiders perceived as supernatural was, in fact, women’s emotional and domestic competence. As one informant, Bi Rehema Mzee, explained: ‘Local women never used charms. They used food, laughter, and respect…Migrant workers were not used to that; they were given peace.’Footnote ⁵³ Such statements reveal how women’s affective labour – cooking, emotional care, and companionship – became both survival strategies and subtle forms of influence. Swahili coastal society, shaped by centuries of Indian Ocean trade and cultural exchange, valued ustaarabu, a code of civility and hospitality. In this moral world, women’s ability to create calm, orderly, and affectionate homes carried deep social significance. Limbwata was therefore less about occult manipulation than about the transformative power of women’s social skills in a male-dominated environment.Footnote ⁵⁴ Migrant labourers’ deep attachment, commitment, and eventual financial sacrifice reflected not the effects of spells but the profound emotional, cultural, and social influence of the women and the life they created in Tanga.

Women in migrant-receiving communities often redirected men’s wages towards local investments and household stability, gaining leverage in the process.Footnote ⁵⁵ Margaret Strobel’s work similarly shows how coastal women utilized emotional intelligence and relational networks to navigate colonial economies.Footnote ⁵⁶ In Tanga, women who formed unions with plantation workers often channelled earnings into building houses, running small businesses, or financing children’s education.Footnote ⁵⁷ The economic flow thus reversed direction: instead of remittances supporting rural families, wages enriched local coastal households. In the eyes of many men, this reallocation of resources appeared as evidence of enchantment, when in reality it reflected women’s pragmatic agency within unequal economies. Gendered outcomes of mobility often diverged: men experienced dislocation, while women in receiving communities accumulated social and economic capital. James Giblin has noted that male migrant labourers were often left with empty pockets ‘the women would rob them of their wits and make them forget their own wives. Saturday was a day of pleasure and entertainment, which kept people around throughout the day. Women from Lushoto would bring foods like cassava and maandazi; they were a real danger.’Footnote ⁵⁸ It was widely believed that men who consumed their food might develop emotional attachments, thereby unsettling established social and labour arrangements. Giblin propounded how male migrant labourers often ended up with empty pockets due to seduction.

In essence, limbwata represents a misinterpretation of affectionate or co-operative marital behaviour. When a husband shows love or assists his wife with domestic chores such as washing clothes, cleaning dishes, or cooking, he is often said to have been ‘bewitched’ by his wife through limbwata. As observed by Nyasiro Gibore and Theodora Bali, men who display affection or publicly support their wives are sometimes ridiculed as being ‘under limbwata’, implying a form of emotional subservience.Footnote ⁵⁹ However, in Swahili popular culture, as in Tanga, women have reclaimed and reinterpreted the concept as a symbol of female agency and authentic love. Shani Omari and her colleagues have documented hand fans and food covers inscribed with sayings such as Sikumroga, sikumchawia, kanipenda mwenyewe (‘I didn’t bewitch him; he just loves me’).Footnote ⁶⁰ These expressions challenge the accusation of magical manipulation, instead affirming mutual affection and women’s emotional autonomy.

A popular quip among young men in Tanga upon arriving at work in the sisal plantations was a half-joking warning: ‘Kaka, usije ukaingia limbwata hapa. Wanawake wa huku ni wa moto!’Footnote ⁶¹ (‘Brother, don’t get caught in limbwata here. The women here are fire!’). This expression captures the dual nature of limbwata both as a playful warning and as a social commentary on the perceived emotional and sexual power of women in plantation society. It reflects male anxieties surrounding love, dependence, and control in the uncertain world of migrant labour, where men were often displaced from familiar kinship systems and subject to new forms of emotional vulnerability. Mohamed Musbah Ali Mohamed and Saraphia Mastai Hindi have offered psychological reinterpretations of limbwata, moving beyond supernatural explanations. They argued that what earlier generations understood as enchantment or bewitchment can instead be analysed through modern emotional and psychological frameworks,Footnote ⁶² particularly Robert Sternberg’s Triangular Theory of Love, which conceptualizes love as a dynamic interplay of intimacy, passion, and commitment.Footnote ⁶³ Within this model, limbwata can be seen not as witchcraft but as a local metaphor for emotional dependency and affective imbalance, where passion or attachment exceeds social norms or expectations. Thus, limbwata has evolved from a supernatural idiom into a psychological and emotional vocabulary that articulates the enduring tensions of attachment, gendered power, and emotional control in Swahili coastal society. It symbolizes how local communities translate emotional experience into moral and cultural discourse, bridging traditional cosmology and modern psychology.

Viewed historically, limbwata reveals more than belief in sorcery; it exposes the emotional structure of economic transformation. From the colonial sisal plantations to the socialist reforms, it has served as a moral language through which men and women negotiated the changing worlds of labour, love, and survival. Its persistence demonstrates how cultural idioms adapt to articulate new realities while preserving traces of the past. As Jean and John Comaroff have argued, such occult economies are not the residues of superstitious thinking but interpretive responses to the dislocations of social life in societies. In Tanga, limbwata stands as both memory and metaphor: a testimony to the intimate costs of global labour systems and a reflection of women’s subtle empowerment through emotional and economic ingenuity.

IV

Among the many social boundaries upheld within Tanga’s plantation communities in north-eastern Tanzania, usinga stood out as one of the most formidable and deeply feared mystical practices. According to the Kamusi ya Kiswahili Sanifu, usinga ni uchawi wa tego anaotegewa mtu aupate kwa njia ya kujamiiana na mke wa mtu, usinga refers to a form of trap-based witchcraft, in which a person becomes bewitched through sexual intercourse with another man’s wife.Footnote ⁶⁴ This curse, rooted in local beliefs among the local people, was believed to inflict death or debilitating illness upon any man who engaged in adultery with another man’s wife. Usinga functioned as a profoundly internalized code of conduct, particularly resonant among migrant workers from other regions of Tanzania. These labourers, working on vast sisal plantations, lived in relative proximity to local communities, where relations were often tense. The potency of usinga derived not from overt physical enforcement but from collective belief, transforming it into a psychological and spiritual mechanism that regulated behaviour in an environment rife with potential for interpersonal conflict, including rivalries over resources and relationships.

Oral histories, especially from the sisal plantations in the Tanga region, depict usinga as an inexorable force that induced a gradual, inexplicable sickness such as chronic wasting, unexplained fevers, organ failure, or an abrupt demise in the transgressor.Footnote ⁶⁵ These narratives emphasize the curse’s supernatural inevitability, drawing on a worldview where spiritual forces actively intervene in human affairs. Once activated, it was deemed irreversible; no repentance, bribe, or flight could mitigate its consequences, as the curse was thought to bind to the offender’s soul or life force, pursuing them across distances. This unavoidability made it a remarkably powerful deterrent to infidelity, far more effective than legal sanctions or social reproach in a context where formal institutions such as courts and the police were either distant or deeply mistrusted.Footnote ⁶⁶

As recounted by Herman Chengula from the Kibaranga estate, a sisal plantation worker whose testimony reflects the lived experiences of many migrants, the application of usinga was not impulsive but followed a deliberate, multi-step process grounded in community norms. A local man in Tanga, suspecting an affair between his wife and a sisal plantation worker, would first issue a verbal warning to the suspected interloper: ‘Sir, I beg you to stay away from my wife.’ This initial step served as a non-violent escalation, allowing for de-escalation if the warning was heeded, and it underscored the value placed on dialogue in local culture. If uncertainty persisted, he would conduct discreet investigations. Only upon confirming the infidelity through eyewitness accounts or spiritual confirmation would he administer a magical remedy often rooted in traditional herbalism or sorcery to his wife. This remedy might involve potions infused with incantations invoking ancestral spirits. Thereafter, any man who consummated an adulterous act with her would succumb without the possibility of forgiveness.Footnote ⁶⁷ As Herman Chengula emphasized, failure to heed initial warnings sealed one’s fate, likening it to being swept away by unrelenting waters, a metaphor evoking the powerful Tanga natural forces in local folklore.

This mechanism extended symmetrically to binding off, though with variations in execution that reflected gendered power dynamics in Tanga’s sisal plantations and neighbouring societies. Men could similarly ‘bind’ their wives through sorcery to prevent extramarital relations, ensuring marital fidelity in a patriarchal framework where male honour was closely tied to control over household reproduction and labour. Elder Juma Hasani Kama from Kibaranga elaborated on this, describing how a husband, upon detecting signs of his wife’s infidelity, such as unusual absences, changes in behaviour, or rumours from the community, might implant a tego (a trap-like charm) within her. One common method involved the husband invoking known rituals, perhaps during a full moon for amplified spiritual potency, then embedding a knife marked with symbolic intent, such as carvings representing unity or punishment. Should the wife engage physically with another man, the pair would become inseparably fused physically stuck in the act, a phenomenon reported in various African cultures as a manifestation of supernatural intervention until the husband intervened to release them by retrieving and ritually undoing the charm. Without his timely arrival, the condition could prove fatal due to dehydration, exposure, or social stigma leading to abandonment. The key to reversal lay hidden with the knife’s location, known only to the husband.Footnote ⁶⁸

Juma Hasani Kama further described alternative forms of tego: one that rendered the adulterous encounter unsatisfying or dysfunctional for the wife, causing physical discomfort or impotence in the lover, yet allowed normal relations upon her return home. This practice thus reinforced the marital bond without causing permanent harm. Women, too, possessed agency in this realm; they could employ similar charms to render their husbands impotent with other women, ensuring fidelity by targeting male virility, a core aspect of masculinity in many Tanga societies. Upon returning to his legitimate spouse, however, the man’s virility would restore itself seamlessly, highlighting the charm’s specificity to extramarital contexts.Footnote ⁶⁹ These practices bear striking parallels to similar anti-adultery charms in other cultures, such as the Yoruba ‘magun’ in Nigeria, where a husband places a charm that causes death or fusion during infidelity,Footnote ⁷⁰ illustrating how such beliefs transcend regions as tools for moral regulation.

Athumani Msabaha, a former manamba (migrant labourer) hailing from Njombe in southern Tanzania, recalled the terror it inspired with palpable intensity:

Such testimonies underscore how usinga permeated daily interactions, fostering hyper-vigilance and restraint among both locals and migrants. In the cramped labour camps of sisal estates, where workers lived in shared barracks amid economic hardships, simple acts like eye contact or casual conversation could be misinterpreted as flirtation, leading to self-policing behaviours. While Tanga’s reputation for hospitality and romantic fluidity, a form of temporary companionship or casual partnership common among migrants separated from their families, suggested a permissive social landscape, usinga marked a clear boundary that could not be crossed. Limbwata allowed people to have short-term relationships without long-term promises. It often provided emotional comfort in the unstable lives of migrant workers but did not interfere with existing marriages. Usinga, on the other hand, acted as a spiritual warning supported by the whole community. Even the fear of it was enough to keep people disciplined.

At its core, usinga reinforced marital sanctity and territorial respect during the chaotic dynamics of plantation life. In these transient settings, where thousands of predominantly male labourers were often single or separated from their families during the peak sisal boom from the 1920s to the 1960s,Footnote ⁷² the risk of disputes over women escalated dramatically. Usinga empowered local men to safeguard their households without relying on violence or formal authorities, thereby averting escalations that could disrupt communal harmony or lead to broader ethnic conflicts. Beyond individual marriages, it bolstered ethnic and territorial hierarchies. Communities such as the Bondei, Digo, Sambaa, and Zigua invoked usinga to render local married women ‘untouchable’ to outsiders, asserting cultural supremacy over migrant workers who arrived with limited social standing and were often viewed as economic intruders. This aligns with broader anthropological insights into sorcery as a tool of social control. As E. E. Evans-Pritchard observed in his work, beliefs in mystical harm serve to explain misfortunes such as sudden illnesses or deaths while regulating conduct, particularly in societies where formal institutions are weak or absent. Among the Azande of Sudan, witchcraft accusations provided a framework for resolving disputes without direct confrontation.Footnote ⁷³ Similarly, in Tanga’s migrant economy, usinga mirrored this by channelling anxieties over infidelity and resource competition into a framework that preserved stability, preventing the plantations from descending into chaos.

Yet usinga introduces a compelling debate that highlights the fluid nature of cultural practices in colonial and post-colonial Tanga. Some narratives position it as an Indigenous practice, deeply embedded in local cosmology and tied to ancestral mizimu (spirits) that guard family lineages. Historical accounts suggest it may have pre-dated colonial migration, serving as a pre-modern mechanism for maintaining kinship purity in small-scale farming communities. Others, like that of Juma Hasani Kama, a self-identified Mzigua from Tanga, contend it was absent from their traditions and instead a construct imported or amplified by migrant labourers to instil fear and discipline behaviour. ‘I am a Zigua from Tanga, but such practices did not exist among us. They were peculiar to the beliefs the migrant labourers had constructed to instil fear or control behaviour’,Footnote ⁷⁴ he asserted. This tension raises questions: Was usinga a genuine local curse wielded by insiders against intruders, or a fabricated narrative that outsiders internalized to navigate unfamiliar social terrains? Anthropologists have grappled with similar ambiguities in African contexts, where migration and colonialism blurred cultural boundaries. Peter Geschiere argued that witchcraft discourses often blur boundaries between ‘authentic’ tradition and adaptive invention, especially in migrant-heavy zones where intimacy and trust are precarious. In Cameroon, for instance, witchcraft beliefs evolved with urbanization to address new inequalities.Footnote ⁷⁵ Likewise, in Tanga’s sisal estates, usinga may have emerged as a hybrid belief co-created in the liminal spaces of labour camps to mitigate the moral ambiguities of displacement, such as family separations and economic desperation.

This duality is not inherently contradictory but rather illustrative of how belief systems impose order in unstable environments, as Mary Douglas elucidated that rituals and taboos, including curses, classify dangers and maintain social purity in ambiguous settings.Footnote ⁷⁶ Much like Tanga’s plantations, these communities relied on collective myths and supernatural sanctions to regulate moral behaviour amid fractured families and ethnic mixing. In such contexts, usinga served as a taboo, marking adultery as a threat to communal ‘purity’ and justifying its severe consequences. Whether rooted in local heritage or migrant folklore, usinga’s performative efficacy was undeniable; its fear moulded actions irrespective of empirical verifiability, as believers attributed unexplained deaths to its power. Maia Green extended this by examining how sorcery accusations in Tanzanian communities regulate gender and kinship, often amplifying patriarchal controls amid economic shifts like cash-crop farming.Footnote ⁷⁷ In Tanga, usinga similarly operated unevenly, targeting male adulterers while sparing women, who were frequently portrayed as passive victims or conduits for the curse rather than as active agents. This reflected entrenched notions of male honour, where rivalry among men, rather than female agency, drove enforcement and women’s roles were confined to reproduction and household stability.

Intriguingly, in the 1960s, inconsistencies in application further complicate the narrative, revealing usinga as a flexible rather than a rigid system. A 1923 annual Tanga report documented young Bondei women reported to be abandoning their husbands for migrant partners without invoking usinga,Footnote ⁷⁸ suggesting selective deployment influenced by changing social norms or individual circumstances. This implies usinga functioned less as an impartial spiritual law and more as a strategic weapon mobilized to defend male prestige or community boundaries when expedient and overlooked otherwise, such as in cases of mutual consent or economic necessity. Such pragmatism echoes Geschiere’s observations on witchcraft’s political dimensions, where beliefs adapt to power dynamics rather than adhering rigidly to doctrine,Footnote ⁷⁹ often exacerbating inequalities in colonial states. Young generations in Tanga view usinga as folklore, known only through elders’ tales, dismissed in favour of scientific explanations for illness or misfortune.Footnote ⁸⁰ Usinga persisted as a moral relic, its legacy in curbing transgression and fortifying boundaries in Tanga’s migrant economy indelible. As anthropologists like Todd Sanders reminded us, such occult practices endure not as relics of the past but as lenses through which communities negotiate modernity, fear, and control, adapting to new challenges while preserving core values of respect and order.Footnote ⁸¹

V

The enduring legacies of usinga and limbwata in Tanga’s sisal plantations transcend their origins in local folklore, emerging as profound cultural instruments that navigated the turbulent intersections of labour migration, gender dynamics, and moral economies from the 1920s to the 1960s. Far from irrational relics dismissed by colonial and early post-colonial historiography, these beliefs illuminated the agency of both men and women in a landscape scarred by exploitation and displacement. Usinga, with its inexorable threat of spiritual retribution, fortified marital boundaries and communal harmony amid the precarious intimacies of migrant life, serving as a non-violent arbiter of fidelity and territorial respect. Limbwata, conversely, reframed women’s affective labour through culinary care, emotional solace, and relational acumen as a form of enchantment, masking male vulnerabilities while highlighting female empowerment in redirecting resources and reshaping households within patriarchal constraints.

By situating these phenomena within broader African historiographical contexts, this study challenges Eurocentric biases that marginalize Indigenous epistemologies, advocating for a decolonized approach that integrates oral testimonies, archival records, and ethnographic insights. In doing so, it reveals how supernatural narratives functioned as adaptive ‘weapons of the weak’, regulating behaviour, mitigating conflicts, and contesting the disruptions of colonial capitalism and post-colonial transformations. As Tanga evolves in the contemporary era amid globalization, urbanization, and shifting gender norms, the fading resonance of usinga and limbwata among younger generations does not diminish their historical significance. Instead, they endure as vital archives of resilience, underscoring the human capacity to weave meaning from chaos and assert control over intimate worlds in the face of systemic forces. Future scholarship must continue to amplify these voices, bridging methodological divides to fully humanize the narratives of Tanzania’s plantation past and inform understandings of cultural agency in Africa’s ongoing migrations and modernity.