Thissala: Your Friend and Aide for Evermore

Back already! (Continued from my previous posts on Thissala.) From a 1981 brochure for the Data General Dasher terminal. Well. Rob pointed out I still missed a chunk of content, but I still would have made it an addendum or a comment on my last post, except then I found a puzzle that both of us had missed, and here I am. Many of the lingering puzzles could be “this isn’t coded yet” territory, but the nature of the puzzle I found is such that it feels highly likely there’s a way through. Let’s do that missing chunk first, and then the new puzzle. Last time I mentioned a section with a “dedication”. Caldera (west) You are in the great caldera of the minor mountain. There is a trail leading up the western slope of the caldera. Set in the ground is a 5 foot monument of marble in the shape of a man. From the sculpture eminates an outstandingly beautiful sound, unlike any other known to humans. The tone, pitch, and volume change constantly, but the rate of change appears to be dependant to…