Additional Guides
A note on the acquisition of these papers appeared in the Annual Report of the Librarian of Congress, (1916): 43-44, and was further described in the Library'sHandbook of Manuscripts(1918): 241-242. An index listing Marcy's correspondents is filed in the card catalogs in the Manuscript Reading Room. Letters from James Y. Mason and James M. Mason in the Addition series at the end of the collection are not included in the index.