It stopped on the bank. Its hooves made no mark on the soft ground as it stared at Harry with its large, silver eyes. Slowly, it bowed its antlered head. And Harry realized . . .

“Prongs,” he whispered.

But as his trembling fingertips stretched toward the creature, it vanished.

Harry stood there, hand still outstretched. Then, with a great leap of his heart, he heard hooves behind him—he whirled around and saw Hermione dashing toward him, dragging Buckbeak behind her.

“What did you do?” she said fiercely. “You said you were only going to keep a lookout!”

“I just saved all our lives . . . ,” said Harry. “Get behind here—behind this bush—I’ll explain.”

Hermione listened to what had just happened with her mouth open yet again.

“Did anyone see you?”

“Yes, haven’t you been listening? I saw me but I thought I was my dad! It’s okay!”

“Harry, I can’t believe it . . . You conjured up a Patronus that drove away all those dementors! That’s very, very advanced magic . . . ”

“I knew I could do it this time,” said Harry, “because I’d already done it . . . Does that make sense?”

“I don’t know—Harry, look at Snape!”

Together they peered around the bush at the other bank. Snape had regained consciousness. He was conjuring stretchers and lifting the limp forms of Harry, Hermione, and Black onto them. A fourth stretcher, no doubt bearing Ron, was already floating at his side. Then, wand held out in front of him, he moved them away toward the castle.

“Right, it’s nearly time,” said Hermione tensely, looking at her watch. “We’ve got about forty-five minutes until Dumbledore locks the door to the hospital wing. We’ve got to rescue Sirius and get back into the ward before anybody realizes we’re missing . . . ”

They waited, watching the moving clouds reflected in the lake, while the bush next to them whispered in the breeze. Buckbeak, bored, was ferreting for worms again.

“D’ you reckon he’s up there yet?” said Harry, checking his watch. He looked up at the castle and began counting the windows to the right of the West Tower.

“Look!” Hermione whispered. “Who’s that? Someone’s coming back out of the castle!”

Harry stared through the darkness. The man was hurrying across the grounds, toward one of the entrances. Something shiny glinted in his belt.

“Macnair!” said Harry. “The executioner! He’s gone to get the dementors! This is it, Hermione—”

Hermione put her hands on Buckbeak’s back and Harry gave her a leg up. Then he placed his foot on one of the lower branches of the bush and climbed up in front of her. He pulled Buckbeak’s rope back over his neck and tied it to the other side of his collar like reins.

“Ready?” he whispered to Hermione. “You’d better hold on to me—”

He nudged Buckbeak’s sides with his heels.