Scale (ca. 1,1,267,200) (w 121?--w 103? n 50?--n 42?). " entered according to act of congress in the year 1870 by w. W. Delacy in the office of the librarian of congress, at washington. "; relief shown by hachures. Prime meridians, greenwich, washington. Covers montana, most of wyoming, and parts of idaho and washington state. Indentifies roads and trails, mines and mineral resources, and military and indian reservations. Includes " sources of information. "; inset (17 x 44 cm), map of the northwestern portion of the united states. Issued folded to 14 x 9 cm in publisher's binding. Date: 1870. Dimensions: 1 map : hand col. ; 69 x 103 cm.
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