Mark Twain-Howells Letters: The Correspondence of Samuel L. Clemens and William D. Howells, 1872-1910

Howells, William Dean and Mark Twain. "Mark Twain-Howells Letters: The Correspondence of Samuel L. Clemens and William D. Howells, 1872-1910." In Mark Twain-Howells Letters: The Correspondence of Samuel L. Clemens and William D. Howells, 1872-1910, edited by enry Nash Smith and William Merriam Gibson. Cambridge: Belknap Press of Harvard University Press, 1960.