It looks like it was HMM (at least that's what the methods say). Anyway, I saved a copy of it (I was, and still am very interested in protoypes). The original implementation used ProtoObject (which is now has a different use in 2.8)...so I just replaced all uses of Proto with Prototype. Seems to work in a 2.8 image (but I didn't do a thorough test).

Thanks, Stephen.

And thanks, especially, Hans-Martin! I knew this would turn out to be a valuable exercise.

- Dan