But at that moment the criminal either heard something—perhaps the movements of Mr. Newton—or he suspected something, for he sharply broke off what he was saying and cried:

“It’s all off! You’re trying to double cross me! Now you’ll never get your chest back!”

There was a click which told that the distant receiver was hung up, and then the line went dead.

“Wait a minute! Wait just a moment! I want to talk business with you!” cried Mr. Swift, rapidly moving the hook of the receiver up and down.

But it was too late. Only silence ensued until finally the operator, attracted by the flashing light which resulted when Mr. Swift moved the hook, asked:

“Number, please?”

“I was talking to some one, but I was cut off,” said the inventor. “Can you get them back for me? It’s important.”

“What number were you talking to?” the girl asked.

“That’s just what I want to know,” said Tom’s father.

“I’m sorry, but if you don’t know the number I can’t ring it for you.”