Hermione was busy with the walls, trying to find stones that could be slid out of place. When Ron called for their attention, she got down on her knees beside the opening in the wall and peered down too, then - because Ron didn't look like he was going to do it - she reached in to the dark crevice and (after a rat skittered and ran out along the stones and she nearly screamed a very manly sort of scream) she pulled out a heavy box that seemed full of all sorts of things. She sat it on the floor beside the opening, starting to dig through them.
There were necklaces and rings and combs of all sorts. It was going to take an hour just to lay them all out. But she started to anyway, along the floor, untangling chains and looking for the right one.