This may be a folie-a-deux, but both Serge Troubetzkoy and I have recollections of my having written a preprint that neither of us can find any trace of in the on-line or off-line universe. It was called "The Busy Bee", and it was a follow-up to my articles in the Mathematical Intelligencer (cowritten with David Gale, Scott Sutherland, and Serge Troubetzkoy) on the Langton Ant and variations thereon. The article was about what happens when you replace the square grid of the Langton Ant by an hexagonal grid. As in the square grid case, you can set up the rules and the initial conditions so that the bee builds ever-larger symmetrical structures in its universe. Well, sort of. I was able to prove that bilateral symmetry reasserts itself infinitely often, but I was never able to show that the structures grow without bound. That is: I wasn't able to rule out the possibility that at some point the structures start to shrink and the universe returns to its initial configuration. Does anyone have a copy of this article? (I'm guessing that I wrote it as a preprint, then discovered that my results were already in work of E.G.D. Cohen, and then let it languish.) Jim Propp