clock, until an unexpected happening brought the matter forcibly to their attention again.
They had been out together to a meeting in the gymnasium one night, and on their return, Phil, who was ahead, had some trouble opening the door.
"One of you fellows left your key in it when you went out," he said, as he removed it, and inserted his own.
"Not me," asserted Tom.
"Me either," declared Sid. "I've got mine."
"So have I," added the end.
Phil said nothing until he had entered the room, followed by his chums. Then, turning on the light, he examined the key he had taken from the door.
"Fellows, look here!" he exclaimed. "Here's a clew to our mysterious visitor and thief. This key is a false one, and has been filed down from some other kind. This thing is getting serious."
