He knew that he had not been asleep, though, and he felt sure that he had really seen and heard something, and was not the victim of a hallucination.

Merriwell sat down again by the open window, and Bart dropped into a chair by his side.
"If the thing comes again, we'll capture it!" said Hodge.

"Somebody may be playing ghost, just to scare us.

I have heard----" He did not complete the sentence, for he really heard something at the moment that stilled the words on his lips and drove the blood out of his face.
Tramp, tramp, tramp, tramp! The sounds came unmistakably from the corridor.
"There it is again!" Frank exclaimed.
Bart leaped toward the door and quickly threw it open.

The lamplight again streamed out into the corridor.