Contemporary manuscript copy of a letter in French from the Marquis de Ségur to Rochambeau, one page both sides, 7.75 x 11, December 18, 1783. Contemporary copy of the letter by Segur to Jean-Baptiste Donatien de Vimeur, comte de Rochambeau, asking him in the name of Washington to join the Society of the Cincinnati. In fine condition, with a trimmed top edge.