1David Bailie Warden to Thomas Jefferson, 28 June 1809 (Jefferson Papers)
Tables of Logarithms (Callet; trans. Warden) [index entry]
2David Bailie Warden to Thomas Jefferson, 27 October 1809 (Jefferson Papers)
Tables of Logarithms (Callet; trans. Warden) [index entry]
3Thomas Jefferson to David Bailie Warden, 15 July 1810 (Jefferson Papers)
Tables of Logarithms (Callet; trans. Warden) [index entry]
4Thomas Jefferson to Robert Patterson, 11 September 1811 (Jefferson Papers)
Tables of Logarithms (Callet; trans. Warden) [index entry]