The burly officer halted him.

"Well, however he got there, he was on the fire-escape and coming down when I see him from the street," he said energetically. "When he seen me he turned into this north window and closed it after him, and my partner'd have given me the whistle if he'd come out again. Which room will it be, now?"

Wilkins glanced significantly at his master.

"If it's the north room on the fire-escape, sir, it must be the room young Mr. Prentiss has to-night."

"And the burglar is supposed to have gone in there?" Anthony said calmly.

"He ain't supposed—he went. I seen him!" stated the law. "And the longer we stand here and talk about it, the more chance he has to kill whoever's in there!"

"Well, as it happens, he isn't killing any one, because he isn't there," Mr. Fry said patiently and with just a touch of contempt. "Any one entering that room must have wakened Mr. Prentiss, and he certainly hasn't called for help. For that matter, I should have heard the window myself, because I sleep very lightly. Nevertheless, if you wish, we will go in there."

Impressively dignified even in his bathrobe, Anthony led the way down the side corridor, with the four trailing after him. They came to the door, and the officer pushed forward, club raised grimly over his right shoulder as he laid his left hand on the knob.

"Where's the light-switch in there?" he whispered.

"Right by the door," Wilkins supplied.