Brookfield, William (Surveyor)Lyon, Lucius, 1800-1851A survey map of Trowbridge Township in Allegan County, Michigan. The southern boundary was measured in 1827, the northern, eastern, and western boundaries in late 1830 and early 1831, and the subdivisions in 1831.JPEG200016adc0d9-22d3-48c4-9898-cacfe863b5afMI-T001N-R013WengDepartment of Natural Resources8888-003Public01N 13W - Survey Map of Trowbridge Township, Allegan County, Page 1 [Michigan]MapsMichigan--AlleganT001N-R013W1827