Life and Letters of William Barton Rogers, edited by Emma Rogers (Boston: Houghton Mifflin & Co., 1896), 2: 185 [this reference indicates 1864, but see also references to report of September 15, 1865, in MIT Corporation Records, AC 278, box 1, vol. 1, pp. 244-248]. Text of document (PDF)
William Barton Rogers Papers (MC 1), box 4, folders 49, 49A, and 49B.