Okay, so I did a bit of digging. I had never heard of this module before, but it looks like it was published in 1976, in a fanzine created by Jaquays and some friends, while she was still in college. She had been playing for about a year.
To be clear, this was published the same year as Palace of the Vampire Queen, reputedly the first published standalone module. I don't have a copy of PotVQ, but I think I recall seeing pages from it, and it wasn't exactly slick. For that matter, Caverns of Thracia and Dark Tower, and pretty much all Judges Guild stuff from this period, aren't particularly slick when compared to the early TSR stuff.
So a kid in college who wasn't very experienced with the game and with extremely limited "professional" examples to reference, in a time before ready access to word processing, knocked this thing out. "Amateurish" is less of a criticism than a description here.
Also, this module had me at Fred, the temperamental amulet of protection.
@Melan called it "
the gold standard of low-level orcs-in-a-hole modules" and I'm not surprised. I'm skimming it now and it's just packed with imagination. The text could be clearer, but I'm confident taking the time to grok it would be worth it.
This is going to the top of my "review to figure out if I can use it in one of my campaigns" pile.