So, I was reading issue #3 of The Judges Guild Journal (August/September 1977) and I came across the above illustration. Though it's not visible in my scan of it, the piece is signed by someone called "Gil Dea." A note beneath it reads, "Illustrations by the Sorcerors Guild, all rights reserved." Additional artwork with the same style and signature and bearing the same copyright notice can be found in several subsequent issues of the Journal.
Does anyone out there in the ether know who Gil Dea is? Is that even the name of an actual person or was it a pseudonym for artists who were part of this "Sorcerors [sic] Guild," whatever that might have been? I'm curious both because I've never heard of this guy before, but also because the artwork is a cut above a lot of the art seen in products of that era.