As before, passing through the archway leads to a more tightly curved wall that probably indicates a round room. This time, though, you stub your toes on something hard. After the flash of pain subsides, you feel around. It's hard... sort of smooth... a bit splintery... oh, there's some cold metal...
After a moment, you conclude that it's a barrel or a chest or some other constructed wooden thing. There's another one just past it as well. Everything smells old and dusty and musty and slightly foul. Somewhere, there's that stink of old death that tentatively lingers around the ancient dead.