1. Lilly Martin [Spencer], letter to her mother, Angelique Martin, November 3, 1841, Collection of the Campus Martius Museum, Marietta, Ohio.
2. Edward D. Mansfield, letter to the Marietta Intelligencer, August 26, 1841.
3. Nicholas Longworth, letter to Hiram Powers, October 23, 1841, Cincinnati History Library and Archives.
4. New York Star, 1840, quoted in Donald R. MacKenzie, “The Itinerant Artist in Early Ohio,” Ohio History Journal 73, no. 1 (Winter 1964): 46.
5. Lilly Martin [Spencer], letter to Angelique Martin, November 3, 1841, Collection of the Campus Martius Museum, Marietta, Ohio.
6. Lilly Martin [Spencer], letter to her father, Giles Martin, March 31, 1842, Ohio History Connection Archives & Library