im currently on the ulcaster dungeon, and i cant get the tome Ulcatser wants. ive looked online for maps and in my game there is a wall where there should be a corridor, in the dire wolf room west of the entrance. Is it a hidden door, or is it just a bug, and how do i get past it?

screenshot attached

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Never mind. i found it.

For anyone else w/ the same issue: you basically have to walk into the lower wall. if you move your mouse around the lower left corner, you can actually move there
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Oh THAT spot. Ah I have some not so pleasant memories of that spot. I remember the first time I played I was stuck there for like 15 minutes trying to figure out where the heck to go, until I accidently clicked too low. That made me so mad I quit the game for like a week.

ha ha ha. yeah, i kept the game on with Iomen detecting traps while i looked online for a solution, hoping it was just a hidden door.

There are not very many of these in this game. The only two places I've found them are the (SPOILER) Cloakwood mines, and Durlag's Tower.