1.) MT: Innocents Abroad [Sales Prospectus] (Hartford: American Publishing Company, 1869).
PS1312 .A1 1869c

2.) MT: A Tramp Abroad (Hartford: American Publishing Company, 1880).
PS 1026 .C4 1880

3.) MT and Charles Dudley Warner: The Gilded Age, a Tale of To-day (Hartford: American Publishing Company, 1873).
PS1311 .A1 1873

4.) MT: Mark Twain's Library of Humor (New York: Charles R. Webster & Company, 1888).
PS1323 .L5 1888

5.) Harpers: Your Mark Twain (New York: Harper & Brothers, 1912).
PS1331 .H36 1912

6.) MT: The New Pilgrim's Progress. A Book of Travel in Pursuit of Pleasure (London: John Camden Hotten [187?])
PS1312 .A1 1870e

6a.) MT: The New Pilgrim's Progress. A Book of Travel in Pursuit of Pleasure (London: John Camden Hotten [187?])
PS1312 .A1 1870b

7.) MT: The Innocents Abroad; or, The New Pilgrim's Progress . . . (Hartford: American Publishing Company, 1869).
PS1312 .A1 1869c

8.) MT: Mark Twain's Speeches, ed. Albert Bigelow Paine (New York: Harper & Brothers, 1923).
PS1322 .S5 1923

9.) MT Collection (accession #6314) item #651:
ALS 1868 Nov. 28, Mark Twain to Joseph H. Twichell