From the Showboat Atlantic City Photograph Collection (PH-00329).

39 x 62 cm. Relief shown by hachures and spot heights. Prime meridian: Greenwich and Washington. Hand colored. Shows natural features, populated places, routes of mail steamships, routes of explorers, locations of Indian tribes, railroad routes, and proposed railroad routes. In top margin: No. 80-81. On verso: New Mexico, Arizona, Colorado, Idaho, Dakota (statistics and other information) and The state of California (statistics and other information). Original publisher: G.W. and C.B. Colton.

Arrangement note: Series I. Demonstrations, Subseries I.B. Other Demonstrations and Strikes