The casement window was open--he had noted that fact while in the garden.

He peeped out, and was just in time to see Robinson emulating a Sioux Indian on the war-path.

The policeman removed his helmet, and was about to peer cautiously through the small window.

The detective's blood ran cold.

What if Hart discovered yet another ghost?
"Robinson--go home!" he said, in sepulchral tones.
The constable positively jumped.