“In what way?”

It was Mr. Dancer’s turn to ask questions.

“To cut that rope.”

“Jove! Chadwick, the boy’s right!”

The inventor clapped Tom on the shoulder.

“You take charge of this,” he said; “anyhow, you know the details of the gun as well as I do by this time.”

“I’m not saying that my plan will be successful, mind,” warned Tom.

“Carry it out on your own lines. I’ll depend upon you absolutely.”

Thanks,” said Tom, half laughing, “but I’ll need help.”

“You shall have it,” agreed the inventor instantly.