Did that look like it ?" The detective seemed both puzzled and disturbed.

"Well, it looked like the shadow of a bat.

I'll say that for it," he said finally.
On the heels of his words the front door bell began to ring.

All turned in the direction of the hall.
"I'll answer that!" said Jack Bailey eagerly.
Miss Cornelia gave him the key to the front door.
"Don't admit anyone till you know who it is," she said.

Bailey nodded and disappeared into the hall.