1Shadrach Ricketson to Thomas Jefferson, 8 June 1809 (Jefferson Papers)
A Brief History of the Influenza, Which prevailed in New-York in 1807 (Ricketson) [index entry]
2Thomas Jefferson to Shadrach Ricketson, 21 June 1809 (Jefferson Papers)
A Brief History of the Influenza, Which prevailed in New-York in 1807 (Ricketson) [index entry]