Photographs of people and homes, and some articles and documents (including copies of contracts for Memorial Art Gallery, Rochester) relating to several generations of the Watson Family of Rochester, New York. Individuals include Don Alonzo Watson (1807-1892) and his wife, Matilda M. Watson, their son James Sibley Watson (1860-1951) and his wife Emily Sibley Watson (1855-1945), and their son James Sibley Watson Jr. (1894-1983) and his wife Hildegard Lasell Watson (1888-1976) and their son Michael Lasell Watson (b. 1918).

Upon Isabel Herdle's death in 2004 at age 99, the MAG inherited most of her estate, consisting of the contents of her longtime Pittsford home. The MAG kept papers that related to their institution and transferred what became the Herdle Family Papers in November 2005. The papers include numerous photographs of the Herdle, Bachman, and Miller families, as well as material related to Gertrude's interest in tombstones as American folk art.