Britain, Calvin Jr.A survey map of Penn Township in Cass County, Michigan, drawn in July 1828.JPEG20005e5855f2-31cc-47ad-9499-6fe01881ddbbMI-T006S-R014WengDepartment of Natural Resources8888-003Public06S 14W - Survey Map of Penn Township, Cass County, Page 1 [Michigan]MapsMichigan--CassT006S-R014W1828