Collection includes information on the life of Granville Stuart, including diaries, correspondence, personal writings, sketches, photographs, and other materials. These items document his life from the 1860s to the 1910s. Also included in the collection are the papers of some of Stuart's relatives, including his brothers, James and Thomas, and his second wife, Allis Isabella Brown Stuart.

This series contains Granville Stuart's writings, circa 1857-1915. Most of the writings are historical sketches or experiences that happened to Stuart throughout his career and travels. The majority of the writings deal with the cattle industry, expeditions and trips (such as navigating down the Missouri River), Native Americans, and pioneers. He also included weather records and reminiscences about his life. Stuart wrote most of these while living in Montana.