Then, as Thad slipped around to one side to cover all lines of retreat.

Hugh reached out a hand and caught hold of the fellow by the shoulder.

At the same time he exclaimed in a severe voice: "Well, what are you doing here, I want to know, trying to break into my locker ?" The other gave a tremendous start, and a low, bubbling cry, half of fright, and also of disgust, came from his lips.

The woollen muffler fell from about his face, and, although he snapped off the light just then by a movement of his thumb, the others had glimpsed his features.
Thad had evidently hit the target in the bull's-eye when he mentioned his suspicions concerning the probable identity of the skulker.
It was Leon Disney!.