“That is something I don’t know and which I would very much like to know.”

For about a minute the boys sat there in silence, overcome with amazement. Jack jumped out of the car. “Come on, fellows,” he called.

“Where to?” asked Paul.

“To my house. I want to find that card.”

Jack was so excited, he had difficulty in restraining himself from running. The other boys kept up with him, walking briskly. At the Stormways home, Jack rushed up the steps of the porch. “You wait here,” he called over his shoulder to his companions.

Two minutes later he came rushing out of the doorway. “Here it is,” he cried, waving the white card.

The two cards were compared; they were identical in every respect. “This is getting to be serious,” whispered Ken.

“Terribly serious,” added Ken. “We must do something about it. The man must be absolutely crazy.”

“Crazy is not the word,” said Paul. “Dangerous is more fitting. If he is permitted to roam the streets without being stopped, only God knows what damage he will do and what crimes he may commit.”