There is something strange about it, something that I can't understand."
The time was to come when Mr. Swift and his son were to get at the bottom of Mr. Berg's reasons, and they learned to their sorrow that he had penetrated some of their secrets.
Before going to bed that night Tom and Mr. Sharp paid a visit to the shed where the submarine was resting on the ways, ready for launching. They found Mr. Jackson on guard and the engineer said that no one had been around. Nor was anything found disturbed.
"It certainly is a great machine," remarked the lad as he looked up at the cigar-shaped bulk towering over his head. "Dad has outdone himself this trip."
"It looks all right," commented Mr. Sharp, "Whether it will work is another question."
"Yes, we can't tell until it's in the water," conceded Tom. "But I hope it does. Dad has spent much time and money on it."
The Advance was, as her name indicated, much in advance of previous submarines. There was not so much difference in outward construction as there was in the means of propulsion and in the manner in which the interior and the machinery were arranged.
The submarine planned by Mr. Swift and Tom
