As a *roff fan, I'd love, love, love to see the
original roff sources.
Especially anything that uses pic/eqn/chem/etc.
I have the source for CSTR 155, a trilogy on raster ellipses. It uses
interesting preprocessors that are, alas, mostly lost: ideal, prefer, eqn.
(If anybody has ideal, I'd love to get it. Even its author, Chris Van Wyk,
doesn't have it.)
Doug