Union general (1815–1874), known as “Old Brains,” who, despite his administrative skill as general in chief, failed to achieve an overall battle strategy for Union forces. Lincoln once described him as “little more than a first rate clerk.” LS signed “H. W. Halleck, Major Genl,” one page, lightly-lined, 5 x 8, Head-Quarters Military Division of the South letterhead, April 2, 1870. Letter to journalist William Conant Church. In full: “I sincerely regret that I shall be unable to accept your very kind invitation to be present at the Annual Reunion & Banquet of the Society of the Army of the Potomac, on the 9th inst.” In fine condition, with intersecting folds, one through a single letter of signature, and a uniform shade of mild toning. RRAuction COA.
