On December 6, 1811, New York City’s mayor, DeWitt Clinton, stood before the New-York Historical Society (N-YHS) and voiced a prediction: “Before the passing away of the present generation, not a single Iroquois will be seen in this state.” I stumbled on Clinton’s speech while assisting with content research for a history exhibition at N-YHS. The exhibit, Acts of Faith: Religion and the American West, opens by examining how Haudenosaunee…