Knauer, JosiahA survey map of a small easternmost portion of Alpena Township in Alpena County, Michigan, measured in 1856 and 1857.JPEG20002912c73f-0a0e-4d64-a11e-5351de0ecf4aMI-T030N-R010EengDepartment of Natural Resources8888-003Public30N 10E - Survey Map of Thunder Bay Islands and Alpena Township, Alpena County, Page 1 [Michigan]MapsMichigan--AlpenaT030N-R010E1856