- 18** : Letter from William Richardson, [18--]
- 18** : Letter from William Richardson, July 4, [18--]
- 18** : Letter from William Richardson, July 22, [18--]
- 18** : Letter from William Richardson, August 26, [18--]
- 1824 : Letter from William Richardson, May 19, 1824
- 1824 : Letter from William Richardson, June 12, 1824
- 1828 : Letter from William Richardson, May 29, 1828
- 1828 : Letter from William Richardson, August 4, 1828
- 1828 : Letter from William Richardson, November 8, 1828