Henry Elling was a banker in Virginia City, Montana, with extensive mercantile, mining, and ranching interests. Collection consists primarily of incoming correspondence (1864-1881). There is one outgoing letterpress book (1892), general ledgers (1873-1901), journals (1873-1901), miscellaneous financial records (1872-1880), and a property abstract volume (ca. 1890). There are subgroups for Elling, Knight, and Company; Montanian Publishing Company; Silver Spring Grist Mill; William Elling; and Mary B. Elling.
The Montana Council of Defense was established during World War I to coordinate county war efforts. It also investigated cases of alleged disloyal activities. Records (1916-1921) include minutes, correspondence, subject files, testimony and exhibits for hearings and special investigations, membership lists, and correspondence of various county councils of defense. Correspondence has been digitized and is available on the Montana Memory Project.