- 18** : Letter from Mr. Skinker, [18--]
- 1820 : Newspaper clipping: National Vaccine Institution, The Virginia Herald, December 13, 1820
- 1828 : Newspaper clipping: Vaccination, Political Arena, February 15, 1828
- 1828 : Letter from Mary F. Skinker, April 8, 1828
- 1829 : Letter from William Lawrence McCarthy Spotswood, March 3, 1829