November 5 Sunday – The New York Times, under “LITERARY NOTES” page 3:

—The announcement that a new work on American humor by Mark Twain and W.D. Howells is in the press is somewhat premature. No such book has as yet been written, and as Mr. Clemens has still in his possession two completed manuscripts, it is difficult to say when a still unwritten book is likely to appear.

Note: This may have been planted by Sam to discourage questions about what would become The Library of Humor.