mation. Now tell me about the craft we are going in. A good deal depends on that."
Tom hardly knew what to answer. He recalled what Mr. Sharp had said about not wanting to tell Captain Weston, until the last moment, that they were going in a submarine, for fear the old seaman (for he was old in point of service though not in years) might not care to risk an under-water trip. Therefore Tom hesitated. Seeing it, Captain Weston remarked quietly:
"I mean, what type is your submarine? Does it go by compressed air, or water power?"
"How do you know it's a submarine?" asked the young inventor quickly, and in some confusion.
"Easy enough. When Mr. Berg thought he was pumping me, I was getting a lot of information from him. He told me about the submarine his firm was building, and, naturally, he mentioned yours. One thing led to another until I got a pretty good idea of your craft. What do you call it?"
"The Advance."
"Good name. I like it, if you don't mind me speaking of it."
"We were afraid you wouldn't like it," commented Tom.
"What, the name?"
