The following note was found inside a recently acquired copy of Ready Ref Sheets, an old Judges Guild book that's probably one of the most useful things ever published for OD&D. I've used it for several other editions of D&D as well. Anyway, here's the note:
I love finding stuff like this in old game books. It just warms my heart to see evidence of unknown people having some fun God knows how long ago.
The Big Screen Barsoom that might have been.
22 minutes ago