I delivered a paper at the Mark Twain Circle/American Humor Conference in Cancun last December on Jokes and Metaphor in Mark Twain, using primarily Freud's _Jokes and Their Relation to the Unconscious_ as critical underpinning. Marc, if you (or anyone else) is interested in a copy, e-mail me and I'll try to e-mail a copy back. I don't think I touched on cigars, though! John Bird