1st edition. A Very Good + copy. 8vo., 614 pp., illustrated with 64 engraved plates and Two large folding maps attached: "Map of Territory of New Mexico" by Kearney's Report ("under instruction from Emory") 1846-47 and "Sketch of part of the march & wagon road of Lt. Colonel Cooke from Santa Fe to the Pacific Ocean 1846-47"by Cooke's Report. Laid in, is a very large (7 foot long) map, titled: "Military Reconnaissance of the Arkansas, Rio Del Norte and Rio Gila. by W. H. Emory". Bound in the original brown cloth with paper title label on the spine. A very clean copy, with plates vibrant, with rich blacks and no spotting or soiling. Maps are also very clean, with very little (if any) breaks along the folds. Lower front tip bumped. Some browning to the paste downs. A Superior copy. Howes E-145. Thirtieth Congress- First Session. Ex. Doc. No. 41. Includes the reports of J.W. Abert and Philip St. George Cooke. Together they summarize the activity of the U.S. Army to the west of Santa Fe after the capture of New Mexico by the Army of the West. This work is considered one of the important chronicles and descriptions of the historic Southwest.