Ch. 3, page 19

For a painfully long second, Tenser was terrified that he had activated another trap -- perhaps the floor would drop away and he would fall into an even deeper pit, or scythe blades would whirl out of the wall, or maybe the pit would fill with magical fire. Such were the dangers of castle dungeon exploration.

But no trap was sprung. Instead, a section of wall moved just slightly, revealing the outline of a door. Secret doors were as common a feature in castle dungeon exploration as traps, to Tenser's experience, but how to open it? Another hidden panel to press? He needed more hands down here.

"Is anyone coming down?" Tenser said, looking up to the top of the pit.

He had no need to worry on that score, for Yrag already had rope in hand and was starting to lower himself down.