Well, that was fast.
About an hour after I posted the challenge, Nat Delaney of Taunton, Somerset, in the United Kingdom found the cameo. (It's here.) He wins a free signed copy of the book.
And the Americans continue to get spanked in this week's Bunkolympics.
Thought you might like to know that I've <a href="http://belladonna.org/Joho/joholibrary.htm">linked you</a>.