Harry seized his folds, but it made no attempt to escape. The Summoning Charm had not worked on it.
“Not under your wrapper, then, Potter?” yelled the Death Eater who had tried the charm and then to his fellows. “Spread now. He’s here.”
Six of the Death Eaters ran toward them: Harry, Ron and Hermione backed as quickly as possible down the nearest side street, and the Death Eaters missed them by inches. They waited in the darkness, listening to the footsteps running up and down, beams of light flying along the street from the Death Eaters’ searching wands.
“Let’s just leave!” Hermione whispered. “Disapparate now!”
“Great idea,” said Ron, but before Harry could reply, a Death Eater shouted, “We know you are here, Potter, and there’s no getting away! We’ll find you!”
“They were ready for us,” whispered Harry. “They set up that spell to tell them we’d come. I reckon they’ve done something to keep us here, trap us—”
“What about Dementors?” called another Death Eater. “Let’em have free rein, they’d find him quick enough!”
“The Dark Lord wants Potter dead by no hands but his—”
“’an Dementors won’t kill him! The Dark Lord wants Potter’s life, nor his soul. He’ll be easier to kill if he’s been Kissed first!”
There were noises of agreement. Dread filled Harry: To repel Dementors they would have to produce Patronuses which would give them away immediately.
“We’re going to have to try to Disapparate, Harry!” Hermione whispered.
Even as she said it, he felt the unnatural cold being spread over the street. Light was sucked from the environment right up to the stars, which vanished. In the pitch blackness, he felt Hermione take hold of his arm and together, they turned on the spot.
The air through which they needed to move, seemed to have become solid: They could not Disapparate; the Death Eaters had cast their charms well. The cold was biting deeper and deeper into Harry’s flesh. He, Ron and Hermione retreated down the side street, groping their way along the wall trying not to make a sound. Then, around the corner, gliding noiselessly, came Dementors, ten or more of them, visible because they were of a denser darkness than their surroundings, with their black cloaks and their scabbed and rotting hands. Could they sense fear in the vicinity? Harry was sure of it: They seemed to be coming more quickly now, taking those dragging, rattling breaths he detested, tasting despair in the air, closing in—
He raised his wand: He could not, would not suffer the Dementor’s Kiss, whatever happened afterward. It was of Ron and Hermione that he thought as he whispered “Expecto Patronum!”