Letter from R. M. Mitchill to Harriette Merrifield Forbes, June 6, 1914
written by Jane D. M'Neely, in Harriette Merrifield Forbes Papers, 1860-1950, of American Antiquarian Society (1914); in Harriette Merrifield Forbes Papers, 1860-1950 (Alexandria, VA: Alexander Street, 2009), 1-2