An extensive bibliography of the geology of Yosemite appears in _A Bibliography of National Parks and Monuments West of the Mississippi River_, Vol. I, 1941, pp. 95-106. The list of Matthes’ contributions to Yosemite literature is long. Probably the most significant and generally useful item is _Geologic History of the Yosemite Valley_. This is a thorough report on the author’s study and also contains a paper by Frank C. Calkins on the granitic rocks of the Yosemite region. Indians provided the motive for the first penetration of the whites into Yosemite Valley, but the ethnology of the region received scant attention during the first years of contacts with the aborigines. Lafayette H. Bunnell, a member of the “discovery” party of 1851, has provided satisfying accounts of the primitive Ah-wah-nee-chees in the valley, and Galen Clark, who was intimately acquainted with members of the original band, recorded their history, customs, and traditions many years after his early contacts with them. In the early ’seventies, Stephen Powers gave to them the attention of a professional ethnologist, and Constance F. Gordon-Cumming studied them in the ’eighties. In 1898, the Bureau of American Ethnology investigated the Indians of the Tuolumne country, and William H. Holmes published the findings. Samuel A. Barrett first published on the geography and dialects of the Miwok (of which the Yosemite Indians were a part) in 1908. Barrett’s work with the Miwok continued for many years, and he is credited with several important papers. Alfred L. Kroeber, a leading authority on California Indians, first published on the Miwok in 1907 and since has published extensively on the Ah-wah-nee-chees and all their neighbors. E. W. Gifford, who has been associated with both Barrett and Kroeber in the ethnological work of the University of California, has made important contributions to the published history and culture of the Miwok. His first paper on his work in the Yosemite region appeared in 1916. C. Hart Merriam devoted careful study to the myths, folk tales, and village sites of the Yosemite Indians early in the 1900’s, and his published accounts appeared in 1910 and 1917. Mrs. H. J. Taylor, working in Yosemite Valley, obtained much important data from one of the last members of the Yosemite band, Maria Lebrado, and since 1932 has published several significant items. In 1941, Elizabeth H. Godfrey, of the Yosemite Museum staff, compiled a popular summary of the work done on the Yosemites entitled, “Yosemite Indians Yesterday and Today,” _Yosemite Nature Notes_, 1941. The Yosemite Museum collections of objects and documents include valuable local Indian materials, which provide a most interesting and convincing story of the Ah-wah-nee-chees.