"Sketch Indicating the Advancement of the Surveys of the Public Lands and the Military Topographical and Geographical Surveys West of the Mississippi", Wheeler, George (Lt)

Large scale, beautifully lithographed in four colors with impressive detail throughout. The map locates more than 130 forts and camps (many flying tiny American flags), nearly 70 Indian reservations, the routes of dozens of early explorers, completed and projected railroads with their land grants, and dozens of Spanish land grants noted. Survey details plotted include base lines, meridians and townships. Wheeler's extensive surveying efforts in the Southwest are indicated by shading, as are Clarence King's along the 40th parallel. The map consists of four joined sheets.

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Condition: A

Issued folding on a clean sheet with a few tiny splits at the fold junctions.