When he looked in, the room was empty.

The light was shining, and the door leading to the corridor was closed.
"No one could have got out of that room without our knowing it!" Merriwell whispered.

Hodge had reached his side, and both were staring into the room.
"Of course not.

The thing is impossible." "And yet those footsteps sounded right here." "Let's go in and take another look into the corridor." For answer Merry drew Bart back into the shadows by the window.
"Keep still right here a little while.

Perhaps the--the thing will return.