sentences:  Head signed the October 7, 1863 "Treaty with the Utah - Tabeguache Band" as U.S. Indian Agent and Commissioner.Also present to sign the agreement was John Evans, Governor of Colorado Territory.John G. Nicolay, President Lincoln's Private Secretary and Secretary to the Commission, signed as a witness along with John M. Chivington, Colonel First Volunteer Cavalry of Colorado, Commanding District (who later led the Sand Creek Massacre), and Lieutenant Colonel Samuel F. Tappan, First Volunteer Cavalry of Colorado then commanding Fort Garland, Colorado Territory.