1. "Map of Kansas, Texas, Colorado, New Mexico and the Indian Territory. With the routes of all columns of United States troops operating against hostile Indians in the Department of the Missouri during the winter of 1868–69. Drawn under instructions received from Maj. Gen. P. H. Sheridan, U.S.A. Comdg. Dept. of the Missouri. By Henry E. Alvord. Captain Tenth Regt. Cavalry. Chief Engineer of Troops in the Field. Camp near Medicine Bluff, Witchita Mts. Indian Territory. Jan'y. 1869"
Estimate: 50,000 – 70,000 USD