Includes letters, 1853-1875, written by Charles E. DeLong to his brother, James, and to his wife and other members of his family, from California mining towns, Virginia City, Japan and Washington, D.C., relating to life in the mining country, his law practice in Nevada, business trips, family matters, etc.; a few letters addressed to him; letters, 1849-1865, written by James R. DeLong to his brother and other members of the family, from Salt Lake (describing the city), from the California gold fields and from a Civil War camp in Georgia; a few letters addressed to him, including one from a Hangtown resident, 1853, describing conditions there; and miscellaneous family letters.