This collection consists primarily of Kate Hammond Fogarty's research notes on mines in the Summit Valley Mining District in the 1860s and 1870s. Also included are writings on the general history of Butte and the surrounding area. The "mines" files are lists of men who owned and located local mining properties filed alphabetically by the name of the mine. The lists sometimes include location descriptions and dates. The "owners and locators" files are notes re the men who owned and located local mining properties, filed alphabetically by the name of the individual. Included are mine location, ownership changes, and dates. Many of the notes in both of these sets of files appear to have been taken from county property records. Her historical writings include unpublished histories of Butte and the Highland Mining District, including biographical sketches of individuals. There is also a short writing about a visit to the site of Fort Union. A miscellany file contains an index to the mines described in her "mines" files, and a name index to the individuals mentioned in the "owners and locators" files and in the biographical sketches. [Seven portraits were separated from "The Highland District" and transferred to the Photo Archives.]