A signed Penniman portrait of Ann Elizabeth Crehore of Milton, Massachusetts is illustrated in Nina Fletcher Little, Little by Little (New York: E.P. Dutton, 1984), p. 154, fig. 205. Please also see Carol Damon Andrews, "John Ritto Penniman, 1782-1841: Ingenious New England Artist," Antiques (July, 1981), pp. 147-170.