J. & C. Walker (Firm)1 map : hand col. ; 30 x 38 cm.Relief shown by hachures."Reduced from the Admiralty survey.v""The height of the hills is expressed in yards."J. & C. Walker sculpt.Outline color.JPEGG 3312 .S9 1832 .S600272053639015091196983engPublicNorth America, Sheet IVMapsGreat LakesUniversity of Michigan