"We will go in the motor boat. She is fast and does not draw much water."
"Can we all go along?"
"No, we'll take one of my sailors, your chum Donald, Tubby Hopkins, you and myself. We haven't settled accounts with Barton yet, and I don't want him left practically alone on the island."
"Do you think he would try to harm the submarine?"
"I think it likely. He has probably been paid to injure it so that the rival power that is working against us can construct its submarines first."
"But you are going to make him confess?"
"If he will, yes. If not, he faces a long prison term, although it will be hard to prove that he actually stole the papers and models."
"But we saw him answering those signals, and then again, last night we saw him meet the men."
"I'm afraid that wouldn't make very good evidence in a court of law," was the rejoinder. "But enough of this now. Tell Hawkins (one of the sailors) to get the boat ready, and hurry through your breakfast We'll start right afterward."
"We can't start too quick for me," was the brisk reply. "Poor old Rob, I wonder what has happened to him."