Shrine of the Sword

A regular reader asked for assistance in finding more information about an obscure, self-published fantasy adventure scenario entitled Shrine of the Sword, written by Paul Mercer and Kevin Conklin, with illustrations by the latter. Here's its cover:

Not much is known about the adventure, not even its date of publication. It's so obscure that there's not even an entry on RPGGeek for it, though there is a very limited one at, of all place, PuzzleGeek. The interior of the adventure is similarly primitive:

Aside from the fact that it's for "higher level characters," Shrine of the Sword is interesting, because it includes eight illustrations intended to be shown to players as an aid to visualizing items and locations within the scenario, much like the illustration booklets included with Tomb of Horrors and Expedition to the Barrier Peaks. Here's an example of one of them: It's a long shot that anyone reading this post knows anything more about it, but I know quite a few of you have been in the hobby for far longer than I and have good memories for historical curiosities like this, so I thought it worth a try. Please share your wisdom in the comments. Thanks!