But before he had made his decision, the snake was level with him, and then, incredibly, miraculously, it was passing; it was following the spitting, hissing noises made by the cold voice beyond the door, and in seconds, the tip of its diamond-patterned tail had vanished through the gap.

There was sweat on Frank’s forehead now, and the hand on the walking stick was trembling. Inside the room, the cold voice was continuing to hiss, and Frank was visited by a strange idea, an impossible idea. . . . This man could talk to snakes.

Frank didn’t understand what was going on. He wanted more than anything to be back in his bed with his hot-water bottle. The problem was that his legs didn’t seem to want to move. As he stood there shaking and trying to master himself, the cold voice switched abruptly to English again.

“Nagini has interesting news, Wormtail,” it said.

“In-indeed, My Lord?” said Wormtail.

“Indeed, yes,” said the voice. “According to Nagini, there is an old Muggle standing right outside this room, listening to every word we say.”

Frank didn’t have a chance to hide himself. There were footsteps, and then the door of the room was flung wide open.

A short, balding man with graying hair, a pointed nose, and small, watery eyes stood before Frank, a mixture of fear and alarm in his face.

“Invite him inside, Wormtail. Where are your manners?”

The cold voice was coming from the ancient armchair before the fire, but Frank couldn’t see the speaker. The snake, on the other hand, was curled up on the rotting hearth rug, like some horrible travesty of a pet dog.

Wormtail beckoned Frank into the room. Though still deeply shaken, Frank took a firmer grip upon his walking stick and limped over the threshold.

The fire was the only source of light in the room; it cast long, spidery shadows upon the walls. Frank stared at the back of the armchair; the man inside it seemed to be even smaller than his servant, for Frank couldn’t even see the back of his head.

“You heard everything, Muggle?” said the cold voice.

“What’s that you’re calling me?” said Frank defiantly, for now that he was inside the room, now that the time had come for some sort of action, he felt braver; it had always been so in the war.

“I am calling you a Muggle,” said the voice coolly. “It means that you are not a wizard.”

“I don’t know what you mean by wizard,” said Frank, his voice growing steadier. “All I know is I’ve heard enough to interest the police tonight, I have. You’ve done murder and you’re planning more! And I’ll tell you this too,” he added, on a sudden inspiration, “my wife knows I’m up here, and if I don’t come back—”

“You have no wife,” said the cold voice, very quietly. “Nobody knows you are here. You told nobody that you were coming. Do not lie to Lord Voldemort, Muggle, for he knows . . . he always knows. . . . ”