The door was wide open.
They boldly entered the building.
It contained only one room, and to the amazement of the officers, it was empty.
Staring around, Old King Brady observed that there was only one door and the two windows they had been watching—one at the rear and the other at the side of the little building.
The door was at another side.
"Gone!" ejaculated the old detective.
"Where?" asked the astonished boy.
"Heaven only knows."
"Search outside."
Old King Brady dashed out the door.