Scope and Content Collection consists of a handwritten letter written on a National Mail and Transportation Company letterhead in 1879 from D. L. Miller in Santa Fe to his friend L. D. Fenn in La Veta, Colorado. The letter talks about business, ranching, and mining interests, including references to a mine in Carbonateville, New Mexico, 24 miles south of Santa Fe and the Monarch Mine, both of which were in the Cerrillos Mining District