Dame Simonetta takes a quick peek down the north-west tunnel. After about 50' she sees chalk marking all of the walls and floor, saying things like: "Dungeon Level 3. Warning! Danger! This means YOU!!! Dungeon Level 3 this way."
The southwest passage leads to an irregularly-shaped cave. The floor is littered with a knee-deep layer of bones. The only other exit is a low, narrow tunnel on the south wall. (Our heroes would have to crawl through, single file.)
Dame Simonetta stoops to examine some of the nearby bones. Are they huge/large/medium/small/tiny? dirty/clean? broken/intact? Held to each other by ligaments or jumbled? Are there any skulls present so that she can try to determine what type of creature they are from?