Samuel Peter Heintzelman and the Sonora Exploring and Mining Company

Samuel Peter Heintzelman and the Sonora Exploring and Mining Company by North, Diane M. T.. hardcover edition. ISBN: 9780816506798.

1980 University of Arizona Press hardcover, Diane M. T. North (California at War: The State and the People during World War I). Samuel Heintzelman was born in Manheim, Pa. in 1805. He graduated from West Point in 1826 and served in the Army until retiring in 1869. He served in the Mexican War and the Civil War. He was also posted in California and the Arizona territory for several years. In 1857 while still on active duty he was involved in establishing the Sonora Exploring and Mining Company south of Tucson to reopen old mines there. He took leave from the Army for 6 months while he managed the company. - https://collections.lancasterhistory.org/