Gorgeous large format railroad map of Minnesota, hand colored by counties. Shows railroads, towns, rivers, lakes, mountains, township surveys, forts, Indian Reservations, etc. Large unexplored region in NW Nebraska. Asher & Adams Atlas was conceived as a Railroad Atlas, but is probably most notably for its relatively unique style and excellent large format treatment of the states west of the Mississippi.
Asher & Adams was a New York publishing firm known for their atlases. Notably, their maps were some of the first to prominently exhibit railroad lines, even if this meant a slight reduction in topographical detail. They specialized especially in state and county maps of the United States.