Tom shrugged his shoulders. "Oh, I know what you mean!" burst out Sid. "It looks as if I wasn't telling the truth. But I am--you'll believe me--some day." "Forget it," advised Phil. "Let's talk about baseball. Have you seen the loving cup trophy?" "It's a beaut!" declared Tom. "I saw it in the doctor's study. We're going to win it, too!" "Hope so," murmured Phil. "If we have a few more games like to-day, we may. But speaking of games----" He was interrupted by a knock on the door. Sid started and leaped up from the sofa. "I'll go," he exclaimed. "If it's a message----" He did not finish, but Tom and Phil looked significantly at each other. Clearly Sid expected another mysterious summons. But, as he opened the portal there stood the Jersey twins. "Hello, fellows," began Joe, "do you want to see some sport?" "Fine sport," added Jerry, who sometimes echoed his brother, a trick that was interchangeable with the twins. "We're always ready for sport," replied Tom. "What is it: baiting a professor, or hazing some freshies?" "Professor," replied Joe. "Pitchfork," echoed Jerry, that name, as I have explained, being applied to Professor Emerson Tines. "What's up now?" asked Phil. "Oh, he's been particularly obnoxious of late," went on Joe. "Some of us had a little smoker the other night, strictly sub-rosa, you understand, but he smelled us out, and now some of us are doing time for it. To-day Bricktop Molloy evolved a little scheme, and we thought we'd let you fellows in on it. Want to come, Sid?" for Sid had gone back to the sofa. "No, I guess not," he answered listlessly. "What's the matter--sick?" inquired Joe, in a whisper of Tom and Phil. They shook their heads, and motioned to the twins not to make further inquiries. "What's the game?" asked Tom. "We'll come." "We're going to get back at Pitchfork," went on Jerry. "Come along and you'll see. I'll just explain, though, that he has quietly been 'tipped off' to the effect that another smoker is in progress, and if he does as we expect him to, he'll try to raid the room." "And if he does?" "Well, he won't find what he expects to. Come on, and keep quiet. What's the matter with Sid, anyhow?" for by this time the four were out in the corridor, leaving the moody one in the room. "Hanged if we know," replied Phil, "except that there's a girl mixed up in it." He refrained from saying anything about the accusation, thinking that would be noised about soon enough. "Oh, if it's only a girl he'll soon be over it," declared Joe with a professional air. "Of course," echoed his brother. "Come on."