1. Letter : Lake Superior, to Blanche Blackmore, 1874 Sep 25. Creator: Blackmore, William, 1827-1878 Published / Created: 1874 September 25 Call Number: WA MSS S-2271 B566 Image Count: 8 Abstract: mill on Lake Michigan. Blackmore also Found in: Beinecke Rare Book and Manuscript Library > Letter : Lake Superior, to Blanche Blackmore, 1874 Sep 25.