The Librarian's Office is the administrative centre of the UBC Library, and in its early years, all administrative activities were based there. However, as the Library became decentralized, these activities were devolved to the relevant branches and divisions. At the same time, the University Librarian's administrative burden increased, so a series of Assistant University Librarians were appointed, each with defined areas of responsibility, including Public Services, Collections, Technical Services and Systems, and Administrative Services.
The sous-fonds consists of records generated by the Librarian's Office and include correspondence (both internal and external), reports, minutes, memorandums, notes, budgets and other financial records, architectural plans, published materials, publicity materials (brochures, newspapers clippings), scrapbooks, and photographs. The records are arranged in thirteen series, six of which are based on the tenures of University Librarians: John Ridington, W. Kaye Lamb, Neal Harlow, Basil Stuart-Stubbs, Douglas McInnes, and Ruth Patrick. Four other series are based on the Assistant University Librarian positions for Public Services, Technical Services and Systems, Administrative Services, and Collections. The series "Librarian's Office - General," consists of records that overlap the tenures of more than one University Librarian. Most series are, in turn, further subdivided into sub-series. Included at the beginning of the General series are loan request records from McGill University College of B.C library. The Irving K. Barber Learning Centre series documents the Library's involvement in the planning and development of the Centre, which replaced the Main Library. The Development Office series documents the Library's fundraising function that supports various projects and programs of other branches and divisions. The Assistant University Librarian for Collections series was originally erroneously identified as the"Collections Division sous-fond."