"My latest invention, or rather the invention of my father and myself," answered Tom, and his voice showed the love and reverence he felt for his parent. "Perhaps I should say adaptation instead of invention," Tom went on, "since that is what it is. But, at any rate, it's my latest--dad's and mine--and it's the newest, biggest, most improved and powerful fighting tank that's been turned out of any shop, as far as I can learn. "Ladies--I mean lady and gentlemen--allow me to present to you War Tank A, and may she rumble till the pride of the Boche is brought low and humble!" cried Tom. "Hurray! That's what I say!" cheered Ned. "That's what I have been at work on lately. I'll give you a little history of it, and then you may come inside and have a ride home." "In that?" cried Mr. Damon. "Yes. I can't promise to move as speedily as your car, but I can make better time than the British tanks. They go about six miles an hour, I understand, and I've got mine geared to ten. That's one improvement dad and I have made." "Ride in that!" cried Mr. Nestor. "Tom, I like you, and I'm glad to see I've been mistaken about you. You have been doing your bit, after all; but--" "Oh, I've only begun!" laughed Tom Swift. "Well, no matter about that. However much I like you," went on Mr. Nestor, "I'd as soon ride on the wings of a thunderbolt as in Tank A, Tom Swift." "Oh, it isn't as bad as that!" laughed the young scientist. "But neither is it a limousine. However, come inside, anyhow, and I'll tell you something about it. Then I guess we can guide it back. The men are repairing the break." The visitors entered the great craft through the door by which Tom had emerged. At first all they saw was a small compartment, with walls of heavy steel, some shelves of the same and a seat which folded up against the wall made of like powerful material. "This is supposed to be the captain's room, where he stays when he directs matters." Tom explained. "The machinery is below and beyond here." "How'd you come to evolve this?" asked Ned. "I haven't seen half enough of the outside, to say nothing of the inside." "You'll have time enough," Tom said. "This is my first completed tank. There are some improvements to be made before we send it to the other side to be copied. "Then they'll make them in England as well as here, and from here we'll ship them in sections." "I don't see how you ever thought of it!" exclaimed the girl, in wonder. "Well, I didn't all at once," Tom answered, with a laugh. "It came by degrees. I first got the idea when I heard of the British tanks.