1Thomas Jefferson to Bernard McMahon, 16 February 1812 (Jefferson Papers)
trees; fir, balsam (balm of Gilead) [index entry]
2Thomas Jefferson to James Ronaldson, 11 October 1812 (Jefferson Papers)
trees; fir, scotch [index entry]
3James Ronaldson to Thomas Jefferson, 2 November 1812 (Jefferson Papers)
trees; fir, scotch [index entry] trees; fir, silver [index entry]
4Thomas Jefferson to François André Michaux, 14 December 1813 (Jefferson Papers)
trees; fir [index entry]