“Hello!” he said quizzically. “Going to study outdoors?”

“N—no,” stammered Roy. “We were—”

“Just going to get a breath of air,” said Chub, coming to his assistance.

“Oh,” said Dick, “well, you’ll find plenty of it out there.”

He held the door open and the other two sauntered out, trying to seem at ease. The door closed behind them. They looked at each other and smiled sheepishly.

“Where’s he going?” whispered Chub.

“Study-room, maybe. We’ll wait a bit and then go in. You go up-stairs and I’ll look around down here. He’s on to us, isn’t he?” Chub nodded.

“Sure,” he answered. “But it won’t help him. Vidocq is on his tail—trail, I mean.”

“And so is Sherlock Holmes,” muttered Roy. “Come on; we’ve been out long enough to get the air.”