This large and very detailed railroad map covers from Detroit west to the Pacific, well into Canada and south to about the 39th parallel and the Great Salt Lake. Absolutely filled with detail; the Pony Express route, overland mail routes, Fremont's exploration routes and dates, proposed and existing railroads, wagon roads, isothermal lines, forts and much more. Wheat calls this a surprising map and devotes nearly five pages describing it and the remarkable Mr. Johnson. At the top is a profile of the Northern Pacific Route. The Northern Pacific had a stormy career enduring recessions, mergers, poor cost controls etc. It was not until 1883 that it actually became a transcontinental railroad. This is a terrific map that displays an amazing amount of detail.

References: Wheat (TMW) 1169

Condition: A

Folding as issued. Clean, bright example with a split along one segment fold.