ALS, one page, 6.25 x 8, March 12, 1863. Buchanan writes to collector Joseph Knight. In full: “In compliance with your request of the 3d instant, it affords me pleasure to furnish you my autograph. Yours respectfully….” Intersecting mailing folds (vertical fold lightly touching “Ja”) and unobtrusive mounting remnant to one edge of reverse, otherwise fine, clean condition. Auction LOA John Reznikoff/PSA/DNA and R&R COA.