Infanticide is an especially triggering form of violence and those killed are sometimes drowned. Confronting this method to end life involves considering specific spatial and forensic patterns and processes to which geographers have given limited attention. I take on that work in this chapter, examining three cases of infanticide involving Mary Ward (1665, Cambridgeshire), Elizabeth Williams (1838, Denbighshire), and Patricia Craig-Waller (1942, Surrey). Each drowned her son, and each was then brought before the courts, with judges and juries weighing medical and eye witness accounts and meting out varied punishments. Archival analysis reveals only part of the outcome of each case but it underscores the dynamism of historical contexts and legal, medical, and cultural geographies. Particularly clear is a shift in approach to the three mothers that maps onto larger societal change: the first is accounted diabolical, the second desperate, and the last depressed. The spatialities of the drowning sites—a filthy ditch, a swift-running river, and a shallow suburban lake—seem to mirror those accounts and the three water bodies are active participants in each event insofar as they encapsulate specific societal fears about motherhood as a pathology. Those spatialities are echoed in the official records of each case, which reveal larger geographies of violence, justice, and forms of oppression, patriarchal norms not least among them.