1John Wood to Thomas Jefferson, 27 July 1819 (Jefferson Papers)
scientific instruments; sextants [index entry]
2John Wood to Thomas Jefferson, 2 February 1817 (Jefferson Papers)
scientific instruments; sextants [index entry]
3John Wood to Thomas Jefferson, 2 August 1816 (Jefferson Papers)
scientific instruments; sextants [index entry]
4John Wood to Thomas Jefferson, 6 April 1816 (Jefferson Papers)
scientific instruments; sextants [index entry]