Series consists of C.V's, biographical notes, clippings and articles about M.Y. Williams, miscellaneous financial records, and early educational records.

Series consists of extensive research notes, draft manuscripts and source materials used by Williams in conducting family history research. Copies of "The Bowerman Family, 1379 to the Present: English, American, Canadian" [CS 71 B69 W4] and "The Samuel Williams, Jemima Platt Family" [CS 90 W54] are available in Special Collections as well as in the fonds. Series also includes three postcard albums collected by M.Y. Williams' mother, Carrie Williams and numerous photographs.

Series consists of correspondence, minutes, printed material, programs, reports, publications, and lecture and course notes about the Geological Society of America, the Royal Society of Canada, Museums in Vancouver, and the Canadian Department of Mines Geological Survey.

Photos in this series consist of photographs of M.Y. Williams' family. Photographs have been assigned series UBC 49.1, and 49.1/1 to 49.1/147 contain both prints and small prints of the Wiliams family. In this series are photos by WL Uglow taken in 1922; amongst Uglow's photographs, there are images of geological features, campsites, prospecting, logging, and BC towns such as Bakerville, Nookta village and the Tofino "life-saving station." Photos of people include CS Evans, Anthony Watson and C.O. Swanson. There is also a photo taken in Japan of Professor W.J. Head of Wisconsin. These photos can be found from 49.1/148 to 49.1/249. A group photo dated 1947 features Okalitch, Gunning, Swanson, Williams, Warren and Weir (49.1/251). There are also wildlife photos courtesy of the Canadian National Railway and photos of fossils and diatoms. The photo of dinosaur bones in UBC's Department of Geology is dated 1950. These photos are in boxes 52 (1-127) & 53 (128-269).

An itemized inventory of the glass slides is available on the last two pages of the finding aid. The glass slides are located in the vault. (49.1/270 to 382).

Series consists of copies of all of M.Y. William's publications which formed part of the papers. As established by Williams' bibliography, the publications have been divided into the following categories: "Geology," "Geography," and "Ornithology and Zoology."

Series consists of manuscripts, research materials and correspondence relating to M.Y. William's publications and reports.

Items in file 13-3a "Birds of Hong Kong" were transferred to the University Archives by David Mattison of the British Columbia Archives.

Series consists of reprints gathered by M.Y. Williams, reflecting his broad interest in geology and natural history. Series is arranged alphabetically by author and, on rare occasions, by subject.

Series consists of copies of reports written by M.Y. Williams. Series is arranged chronologically.

Series consists of six file drawers of index cards generated by M.Y. Williams in his research and one box of index cards documenting his map collection.

Series consists of various published materials in the areas of geography and literature.

Series consists of field notebooks created by Williams or others who worked on projects he was involved. Series is arranged chronologically by date of creation. In addition, notes briefly explaining the creation of the notebooks have been added.

Series consists of incoming and copies of outgoing correspondence. Series is arranged alphabetically by correspondent or subject.

Series consists of geographical maps pertaining to various regions, particularly within Canada. Series is arranged alphabetically by country and, within Canada, by province.

Fonds consists of biographical notes, clippings, articles, early educational records, research notes, draft manuscripts, field notebooks, reports, publications, correspondence, lecture and course notes, maps, photographic prints, and slides pertaining to M.Y. Williams' professional and personal activities.