"We represent the society of Blue Bloods," answered Andy in muffled tones. "We'd like to have you join. It is a very secret society and we only meet at night, as the professors are opposed to it. Will you come out and join?"

"Sure!" cried Chet, delighted to think that he had so soon been singled out for the honor. "Wait until I dress."

"Never mind that," hastily urged Andy. "We will dress you in the robes of the novice as soon as we reach our rooms. Slip on a bath robe."

"In a minute! In a minute!" said Chet hastily. They could hear him moving about the room, and the next moment his door was opened.

"This way," whispered Andy, taking care to keep his face in the shadow of the single hall light. "Take my hand. Move on, true and loyal members of the Blue Bloods! We have the honored candidate!"

"I'm ever so much obliged for letting me join," began Chet.

"Silence!" whispered Frank. "You may not be so glad—later," he added in a low voice.

The others managed to get Chet outside of the building before he suspected anything, and without arousing any of the professors or monitors. Then an unlucky gleam from a lamp shone on Andy's face. Chet instantly drew back.

"No, you don't!" he cried. "I see your scheme now! You are going to do something to me!"

"How'd you guess it?" demanded Andy.