"Bancroft Library. Mark Twain Papers." . . . . . . . . "Samuel Langhorne Clemens' letters" . . "Mark Twain letters" . "Mark Twain's letters" . "Archives" . . . "Letters written by, or on behalf of, Mark Twain (Samuel Langhorne Clemens), during his lifetime, that is, before April 22, 1910. Also includes letters by his wife, Olivia L. Clemens, his daughters Susy, Clara, and Jane (Jean), and by his secretary Isabel V. Lyon. Recipients include: Orion Clemens, Jervis and Olivia Lewis Langdon, Samuel E. Moffett, Albert Bigelow Paine, Dorothy Quick, Henry H. Rogers, Charles L. Webster, Franklin G. Whitmore, and others." . . . . . . . . . . "Mark Twain correspondence : outgoing letters" . "Records and correspondence" . . . .