Large and extremely detailed chart by J.H. Clark, U.S. Commissioner, drawn by J.E. Weyss, circa 1860. The map features the survey lines between Texas and New Mexico with good topographical detail. Locates forts, Raton Pass, the Santa Fe and Albuquerque trails, numerous explorer's routes, and Indian trails. The map is an interesting historical curiosity because it was not published when the survey was finished due to the outbreak of the Civil War. In 1902 it was belatedly included in a Geological Survey Bulletin by Marcus Baker.

References: Wheat [TMW] #1022.

Condition: A

Issued folding, now backed with archival tissue. Light toning along some folds, still very good.