William Allen Dulles. ALS, 3 pp., New York, Oct. 9, 1863. To Edw. DeForest, chairman of the United Literary Societies of Dartmouth, thanking him for an invitation to deliver a poem before the group. He indicates that his professional engagements preclude him from entering into an arrangement of the kind that is proposed, so he must decline. 7 3/8” x 9” sheet folded to 4 1/2” x 7 /38”; clean, neat and legible. Fine.