Remarkable forms of self-governance and collective identity developed within these carceral communities, another means of dealing with the deprivations of captivity. They encouraged solidarity and mutual support, especially among poorer prisoners. And yet, ironically, they could enable greater social control within the prison. Chapter 4 analyses the corporations – headed by elected or customarily selected stewards – through which prisoners managed life inside. They provided the foundations for practical and symbolic collective identities that prisoners also communicated to the wider world. Based around the administration of charity, this culture of self-governance gave rise to customs and practices by which prisoners collectively negotiated their time in prison. Yet although potentially empowering, the formal extension of officeholding to prisoners also represented the wider diffusion of early modern state power into prison populations and an attempt to exert greater social control over them. Indeed, this chapter challenges our view of early modern self-government – often understood as a mechanism of local autonomy and negotiation with higher powers – by discussing an extreme example in which participants could be actively involved in constricting their own liberty.