It was a quick run to the school, and the boys asked Will Knox to stop the car a short distance from their dormitory so that no one would hear the noise of the engine.
"Think you can get in?" he asked, as he prepared to turn back.
"Sure," whispered Frank, as he and his brother moved forward in the darkness. It was comparatively an easy matter to effect an entrance to the dormitory. Like many other things about the school, the door locks were broken, so the lads had no difficulty in swinging back a side portal. Then, removing their shoes, they went softly to their rooms.
"Thorny isn't back yet or we'd hear a commotion," was Frank's opinion, with which Andy agreed.
They lost no time in undressing and getting into bed. Then they waited the arrival of the crabbed teacher, which they felt could not be long delayed.
They were just beginning to get drowsy, in spite of the excitement of the evening, when they heard voices and steps in the corridor of the lower story.
"There he is!" exclaimed Andy.
"Sure. Keep quiet," advised Frank.
"I tell you they are out!" they heard Mr. Callum saying. "I saw them over in Dailsburg not an hour ago. It is impossible for them to have returned. I caught the first car back."
"But I hardly understand how they could have been out," answered a voice which the boys recognized as that of Professor Dickson. "I have heard no one enter or leave the building since the hour struck."