The Mysterious Affair at Elsinore exists, I believe, only at the Library of Congress...except I have a very old xerox copy, and am happy to send you one if you contact me off-LJ at redchance at aol.com. As for "My Nephew Hamlet," I bought it in England, and it's by someone named John...Turogh? Turok? Something like that. Alas, I loaned it to someone and will probably never seen it again.