The Quiet Ossuary

Someone spent a great deal of care arranging what is stacked against the far wall. You are in a small chamber: 3 paces one way and 1 pace the other. Someone has turned every skull in one row to face the passage. It took patience. Your own footsteps arrive back a moment late. Someone has scratched a tally into the wall — 19 marks, the last one shallow, unfinished. There is a hollow sound behind the north wall, as though the stone were not solid.

Depth 19.

You are reading the dungeon, not walking it. Rooms are only created by people, and only from inside the maze.