Whelpley, ThomasA survey map detailing islands in the portion of the Grand River that runs through Sections 28 and 33 of Portland Township in Ionia County, Michigan. The survey was completed in 1855.JPEG200088c4fafa-ba4b-44ff-a3f5-19c85cee258fMI-T006N-R005WengDepartment of Natural Resources8888-003Public06N 05W - Survey Map of Portland Township, Ionia County, Page 4 [Michigan]MapsMichigan--IoniaT006N-R005W1855