“Myrtle!” Harry tried to shout—but once again, nothing came out of his mouth but a very large bubble. Moaning Myrtle actually giggled.

“You want to try over there!” she said, pointing. “I won’t come with you . . . I don’t like them much, they always chase me when I get too close . . . ”

Harry gave her the thumbs-up to show his thanks and set off once more, careful to swim a bit higher over the weed to avoid any more grindylows that might be lurking there.

He swam on for what felt like at least twenty minutes. He was passing over vast expanses of black mud now, which swirled murkily as he disturbed the water. Then, at long last, he heard a snatch of haunting mersong.

“An hour long you’ll have to look,

And to recover what we took . . . ”

Harry swam faster and soon saw a large rock emerge out of the muddy water ahead. It had paintings of merpeople on it; they were carrying spears and chasing what looked like the giant squid. Harry swam on past the rock, following the mersong.

“ . . . your time’s half gone, so tarry not

Lest what you seek stays here to rot . . . ”

A cluster of crude stone dwellings stained with algae loomed suddenly out of the gloom on all sides. Here and there at the dark windows, Harry saw faces . . . faces that bore no resemblance at all to the painting of the mermaid in the prefects’ bathroom . . .

The merpeople had grayish skin and long, wild, dark green hair. Their eyes were yellow, as were their broken teeth, and they wore thick ropes of pebbles around their necks. They leered at Harry as he swam past; one or two of them emerged from their caves to watch him better, their powerful, silver fish tails beating the water, spears clutched in their hands.

Harry sped on, staring around, and soon the dwellings became more numerous; there were gardens of weed around some of them, and he even saw a pet grindylow tied to a stake outside one door. Merpeople were emerging on all sides now, watching him eagerly, pointing at his webbed hands and gills, talking behind their hands to one another. Harry sped around a corner and a very strange sight met his eyes.

A whole crowd of merpeople was floating in front of the houses that lined what looked like a mer-version of a village square. A choir of merpeople was singing in the middle, calling the champions toward them, and behind them rose a crude sort of statue; a gigantic merperson hewn from a boulder. Four people were bound tightly to the tail of the stone merperson.