Wormtail's fast, wheezy breathing was growing louder again. It sounded as though he was
forcing something heavy across the ground. Then he came back within Harry's
range of vision, and Harry saw him pushing a stone cauldron to the foot of the
grave. It was full of what seemed to be water - Harry could hear it slopping around
- and it was larger than any cauldron Harry had ever used; a great stone belly large
enough for a full-grown man to sit in.