Christian Science - The Writings of Mark Twain Vol. 25

Twain, Mark and Charles Dudley Warner. Christian Science: With Notes Containing Corrections to Date (New York: Gabriel Wells, 1923).  The Writings of Mark Twain Vol. 25 (1923) - Hathi Trust (read online

Twain, Mark and Charles Dudley Warner.  Christian Science (New York: P.F. Collier & Sons, 1899). The Writings of Mark Twain Vol. 25 (1899) - Hathi Trust (read online)