Charles Fletcher Lummis (1859-1928) was an American author, editor, librarian, and promoter of the Southwest United States.

The collection includes journals, correspondence, writings, notebooks, and photographs, dating from chiefly 1890 to 1920, of Charles Fletcher Lummis, mostly relating to his family and career with the Southwest Society and Los Angeles Public Library. Selected correspondents include members of the Lummis family, Abeita family, Adolph Bandelier, Amado Chaves, Edgar Hewett, F.W. Hodge, Denis Riordan, and Mary Austin. Letters to his wife Eva Frances in 1892 are from Peru, where Lummis was a member of the Villard Expedition. Also present are drafts of Turbese Lummis Fiske's biography of her father. One of his notebooks chronicles his time as a reporter during the Apache campaign of 1886. Original photographs taken by Lummis include cyanotypes of antiquities, landscapes, pueblos, and Indigenous peoples in New Mexico and Arizona.