Relief shown by hachures. Prime meridians: Washington and Greenwich. Shows railroad surveys and locates Native American tribes. Numbers in upper margin: 80-81. Text on verso describing New Mexico, Arizona, Colorado, Idaho, Dakota, California. "Boundary Line between United States & Mexico according to the Gadsden Treaty June 20th, 1854. This line was run by Major Emory under the Treaty of Dec. 30th 1853." From Colton's General Atlas, Containing One Hundred And Eighty Steel Plate Maps And Plans, On One Hundred And Nineteen Imperial Folio Sheets, Drawn By G. Woolworth Colton...New York: G.W. & C.B. Colton, No. 172 William Street. 1874. 1 map: col.; 41 x 67 cm. This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.