"Professor Tines," he said, "you can knock on that door there, and ask Clinton and Parsons if I'm not Henderson. I've been out after a fox, and I fell in the bog." "Ha!" cried the professor. "I see it now. You are trying to play a joke on me, with the aid of Clinton and Parsons. But you shall all three suffer for it! I _will_ knock on that door. I _will_ confront your fellow conspirators with the evidence of their silly act. Come here," and he placed his hand on Phil's shoulder and led him toward the room of the three chums. "You shall not trifle with me!" he added fiercely. Holding Sid firmly by the shoulder with one hand, Professor Tines with the other knocked loudly at the portal. Phil and Tom were within, and the latter quickly opened the door, for the summons was imperative. The two chums in the room started back at the sight of the instructor having in custody the mud-covered figure. "Young gentlemen," began the professor sternly, "this--this person asserts that he is Henderson, and that he rooms here. I caught him in the corridor, and at once detected the joke he was about to play. He appealed to me to bring him here for identification. Have you three conspired to play a trick on me? Is this Henderson or is it not?" Tom and Phil stared at the disreputable figure. They knew at once that it was their chum, but the spirit of mischief entered into Tom. He nudged Phil, and then answered promptly: "Certainly not, Professor Tines. We don't know the person!" Then he shut the door, while, with a cry of rage at the desertion of his friends, Sid tried to break away from the Latin teacher. CHAPTER XXVIII TOM IS JEALOUS "Ha! I knew you were up to some trick!" cried Professor Tines. "You are no student of Randall College at all! I'll take you to Proctor Zane, and he'll give you in charge of an officer! Perhaps you are a thief, and have stolen that camera!" "It's mine!" exclaimed Sid, unable to understand the action of Tom and Phil. "I tell you I am Henderson, professor!" "Indeed! Then how do you account for Parsons and Clinton failing to identify you?" "That's a--a joke!" Sid was forced to say. "Ha! I knew there was some trick in it! So you admit you were trying to play a joke on me in having them identify you?" "No, no!" cried Sid, alarmed at this misunderstanding. "They were joking when they said I wasn't Henderson." "Well, who are you, then?" "Why, I _am_ Henderson. This is my camera." "Don't make it any worse, young man," warned the teacher sternly. "Come with me to the proctor!" There was no help for it, Sid had to go. He might have broken away from the professor, but he did not like to try it, for Mr. Tines seemed very determined, and the ensuing tumult would bring into the corridor a throng of students, so that Sid would never hear the last of the joke that had turned on him. He went along quietly, thankful that it was dark, and that no one would see him in the walk across the campus to the proctor's quarters.