- 18** : Letter from Thomas Seddon, [18--]
- 18** : Letter from Thomas Seddon, [18--]
- 1822 : Letter from Thomas Seddon, April 6, 1822
- 1823 : Letter from Thomas Seddon, September 6, 1823
- 1928 : Book excerpt: Minor Sketches of Major Folk and Where They Sleep: The Old Masonic Burying Ground, Fredericksburg, Virginia, by Dora C. Jett, 1928