wonderful craft, of which my readers have been told in
detail in a previous volume, was safely housed in a large
tent, which was securely fastened.

Mr. Sharp and Tom, carrying some bundles which they had
taken from the car, or cabin, of the craft, went toward a
large shed, which adjoined the house that Mr. Swift had
hired for the season at the seashore. They found the lad's
father standing before a great shape, which loomed up dimly
in the semi-darkness of the building. It was like an immense
cylinder, pointed at either end, and here and there were
openings, covered with thick glass, like immense, bulging
eyes. From the number of tools and machinery all about the
place, and from the appearance of the great cylinder itself,
it was easy to see that it was only partly completed.

"Well, how goes it, dad?" asked the youth, as he deposited
his bundle on a bench. "Do you think you can make it work?"

"I think so, Tom. The positive and negative plates are
giving me considerable trouble, though. But I guess we can
solve the problem. Did you bring me the galvanometer?"

"Yes, and all the other things," and the young inventor
proceeded to take the articles from the bundles he carried.

Mr. Swift looked them over carefully, while Tom walked
about examining the submarine, for such was the queer craft
that was contained in the shed. He noted that some progress
had been made on it since he had left the seacoast several