I have the version of festoon, as enhanced by Nils-Peter Nelson, and as Norman Wilson said, mainly and originally done by Ron Hardin. When the Usenet interchange referred to happened, I asked Ron whether he wanted to release it, and the response was Incidentally, Hardin worked for Bell Labs, though at the Columbus location also occupied by Western Electric, and until fairly recently was a consultant for our own and nearby groups. The first Google pages for "hardin sloane" yields a bunch of references to his joint work with the well-known mathematician N. J. A. Sloane. Binary, but not source, was with research 8th edition, and may have escaped otherwise. I'll make the source available to scholars if there's interest. It even compiles on Plan 9 (with ape). Dennis