"We now have nearly all of the class pins," he said. "But fully nine-tenths of the postage stamps are still missing and they represent a value of at least twenty-five hundred dollars. I am tolerably sure that Maurice Hamilton took them in his sleep, but the question is, did he destroy the others, or did somebody else come along and take them?"
"I believe Chip Macklin came to see you, sir," said Dave, significantly.
"He did, Porter, and I am going to follow that clew up—if it is a clew," answered Doctor Clay, gravely.
After the others had departed, Dave showed the things he had found belonging to Billy Dill. The master of the Hall was as much astonished as anybody over the resemblance between his pupil and the photograph, and examined the picture with care.
"I do not wonder that you wish to investigate this," said he. "I should wish to do so, were I in your position."
"I have simply got to do it, Doctor!" cried Dave. "I shall not be able to settle my mind on a thing until it's done. Would you go home and see Mr. Wadsworth and Professor Potts first, or go direct to that sailor?"
"Why not send a long letter to your friends, telling them what you have told me? You can add that I agree that the photograph resembles you
