But the Bradys knew better.

They were sure that the villain knew of their presence.

“We will test it,” said Old King Brady, after some discussion.

The old detective left the doorway and leisurely sauntered toward the corner.

Instantly Van, who appeared to be studying something in his hand, began also to change his position.

“Ah! That is it!” thought the old detective. “He can see me plainly enough from the little mirror he carries in his hand.”

Very swiftly the old detective revolved a plan of action in his head.

He acted with great suddenness.

As he slowly approached, Van moved as slowly away.

This was irritating to the old detective.