Memoirs of Lee, "Eulogy on Washington", Dec. 26, 1799, reported in Bartlett's Familiar Quotations, 10th ed. (1919). First presented in a slightly modified form as: "To the memory of the Man, first in war, first in peace, and first in the hearts of his fellow-citizens", Resolutions presented to the United States' House of Representatives, on the Death of Washington, December, 1799. The eulogy was delivered a week later. Marshall, in his Life of Washington, volume v. page 767, says in a note that https://en.wikiquote.org/wiki/Henry_Lee_III