Niece of the unmarried President James Buchanan who served as White House hostess—effectively acting as First Lady—during her uncle’s administration (1957–1861). ANS, one page, 4 x 3, personal letterhead, November 1, 1888. Brief note, reading “Believe me - very sincerely yours.” Nicely signed at the conclusion by Johnston. In fine condition, with trimmed lower edge. R&R COA.