"State of Colorado. Compiled from the Official Records of the General Land Office and Other Sources...", General Land Office

This great map details the extent of public surveys in Colorado. Originally issued in 1905, the map was revised in 1906 to show townships containing "workable coal" in orange and townships "probably containing workable coal" in blue. It is densely filled with information including railroads, Indian reservations, military reservations, forests, and the location of land offices. Published under the direction of Frank Bond, Chief of Drafting.

References:

Condition: A

A clean example with bold coloring. Issued folding with faint toning along a few folds.