How were seventeenth-century projects of wetland improvement remembered and revived in the centuries that followed? What remnants of wetlands past persist in popular memory, troublesome spirits, floodwaters, and nature reserves? This chapter traces afterlives of the turbulence and tumult generated by fen projects. In doing so, it weaves together the key strands of this book. First, new intellectual and political tools were needed to define and implement wetland improvement, reconceiving the scale of environmental thought and action in early modern England. Second, customary politics proved a powerful force in the negotiation of improvement as commoners intervened in the flow of water, the exercise of property rights, and the practice of sovereignty. Finally, coercive projects of environmental change expanded cracks in the exercise of central authority, becoming entangled in civil war conflict and imperilling the stability of improvement. It concludes by asking what conflict over early modern wetlands can tell us about the environmental politics of the Anthropocene.