1William O. Allen to Thomas Jefferson, 9 February 1810 (Jefferson Papers)
On the 28–9 p. of the enclosed Book you will find “the Speech of Logan ”—It bears date in London , 1780. Your first addition, of the “Notes on Virginia ” was, I believe, printed in Paris ,— 1783 . A long time posterior to their appearance, the Authenticity of that much admired speech , was questioned, by the calumny, of L. Martin Esq