Mark Twain's Letters, Volume 5: 1872-1873 by Mark Twain (Author), Lin Salamo (Editor), Harriet E. Smith (Editor) July 1997 Hardcover $125.00, £105.00
Mark Twain's Letters, Volume 6: 1874-1875 by Mark Twain (Author), Michael Barry Frank (Editor), Harriet E. Smith (Editor) November 2002 Hardcover $125.00, £105.00
