Burt, William Austin, 1792-1858Clark, Robert Jr.A survey map of Porter Township in Midland County, Michigan.The township lines were measured in 1831; the subdivision lines were re-surveyed in 1852.JPEG20002b88569e-5f97-4070-ba67-2ba01a0e50d7MI-T013N-R001WengDepartment of Natural Resources8888-003Public13N 01W - Survey Map of Porter Township, Midland County [Michigan]MapsMichigan--MidlandT013N-R001W1831