1. Map of the United States lead mines on the upper Mississippi River Maps University Of Michigan Public content 1829. Colorado-Henkle Collection. IDeKN and Martin, Ebenezer (Engraver). 1 map : col. ; 38 x 45 cm, folded in cover 10 x 5 cm Cover title: Map of lead mines. Relief shown pictorially. Includes an area bounded by the Wisc...