MOSES, ANNA MARY ROBERTSON ("Grandma") (1860-1961). Photograph signed ("Grandma Moses"), n.p., n.d. [circa 1950]. 215 x 165 mm. (8½ x 6½ in.) including margin; matted. A half-length portrait showing everybody's "Grandma" (discovered at age 81), painting at a table, signed on the lower-right corner.