Connor Freff Cochran gave me some info that demystified this unsung hero (well, illustrator:). Per Connor: "JM Weiss was Judith M. Weiss, a calligrapher and trained industrial
designer I knew in Philadelphia back when I was doing the TITAN art in 1978.
I thought Judith could do a great job with the map and tech diagram that I
thought should be in the book -- certainly much better than I could -- so I
talked Berkeley into hiring her. What she turned out was even more
impressive than I expected."
There is an ongoing quest for a full Gaean map. By hook or by crook... I want that map! Oh sure, I could just friggin' DRAW one. But that just wouldn't be the same, now would it? :)