Best Book Title Ever

I've just scoured the internet (as well as the biography I have at hand) for confirmation, but could not find anything which corroborates the story I believe to be true about the unusual title of the book seen above, "20,000 Leagues Under The Sea or David Copperfield," a 1928 collection of Robert Benchley pieces.

The story is this: Somebody mentioned to Benchley that book titles could not be copyrighted.