The Ezra T. Clark Collection is a family history collection comprising autobiographies, biographies written by family members, oral histories, personal journals (mostly Mormon mission writings), memoirs, interviews, funeral programs, and assorted printed and manuscript ephemera. These records have been created or copied and placed into individual booklets. Each booklet focuses on one individual.

Contains many letters, speeches, and articles written by Clark. Many are letters written to his family members in the holiday season, and the speeches and articles were often given at Brigham Young University-sponsored events or published in church magazines such as the Ensign. The letters were compiled by Clark's daugher, transcribed, and put in chronological order following his death, dated 1956 to 1977.

Histories of Baker, Clark, and Stubbs families, 1940-1963. The collection includes genealogy, family history, and biographical sketches for the Clark, Stubbs, Baker, Higby, and Peay families.