Fonds is comprised of materials created and accumulated by Kay Rex. Includes materials relating to her personal, family and professional life, correspondence, photographs, ephemera, artifacts, clippings, notes, etc. Also includes some materials relating to her aunt Frances Kathleen Montgomery and the Canadian Women's Press Club.

Accrual consists of materials primarily created posthumously relating to the life of Kay Rex. Includes a copy of her will, the order of service for her funeral, sympathy cards and one photograph of Kay.