Washington: Government Printing Office, 1877.
First Edition. Hardcover. Very good. 8vo, pp. viii,  (errata), -856, complete with 40 maps and plates (including a large folding map titled "Sketch of the Primary Triangulation of Colorado" not included in the table of plates), illustrations in the text, and index. Bound in original three-quarter leather and marbled boards, with marbled edges and endpapers. Leather rubbed at extremities and starting to split at the lower front joint. Internally sound and clean, with the Colorado map slightly misfolded.