The collection was acquired in 1992 from an American family that had been friends of Walter de la Mare (1873-1956). The collection includes most of Walter de la Mare's published writings, often in multiple editions; in many cases the dust jacket is present. Many of the volumes are author's presentation copies. The collection includes 135 titles, 89 letters from de la Mare, 3 photographic portraits and numerous off-prints.
Records for the holdings are in the McGill Library on-line catalogue.