"It's an old one where they started to make beet sugar, but it didn't pan out," the farmer said. "The place is in ruins, and I did hear, not long ago, that somebody run a threshin' machine through it, an' busted it up worse than before." "Great horned toads!" cried Ned. "That must be the very factory Tom ran his tank through. And to think he should be a prisoner there!" "Held by whom, do you suppose?" asked Mr. Damon. "By that Blakeson gang, I imagine," Ned answered. "There's no time to lose. We must go to his rescue!" "Of course!" agreed Mr. Damon. "We're much obliged to you for bringing this note," he went on to the farmer. "And here is something to repay you for your trouble," and he took out his wallet. "Shucks! I didn't do this for pay!" objected the farmer. "It's a pity I wouldn't help anybody what's in trouble! If I'd a-knowed what it meant, me and Bub here would have gone to the factory ourselves, maybe, and done the work quicker. But I didn't know--what with war times and such-like--but that it would be better to deliver the note." "It turns out as well, perhaps," agreed Ned. "We'll look after Tom now." "And I'll come along and help," said the farmer. "If there's a gang of tramps in that factory, you may need some reinforcements. I've got a couple of new axe handles in my machine, and they'll come in mighty handy as clubs." "That's so," said Mr. Damon. "But I fancy Tom is simply locked in the deserted factory office, with no one on guard. We can get him out once we get there, and we'll be glad to have you come with us. So if you won't take any reward, maybe your boy will, as he found the note," and Mr. Damon pressed some bills into the hands of the boy, who, it is needless to say, was glad to get them. It was a run of several miles back to the deserted factory, and though they passed houses on the way, it was decided that no addition to their force was necessary, though they did stop at a blacksmith shop, where they borrowed a heavy sledge to batter down a door if such action should be needed. The farmer's rattletrap of a car, in spite of its appearance, was not far behind Ned's runabout, and in a comparatively short time all were within sight of the ruined place--a ruin made more complete by the passage through it of Tom Swift's war tank. "And to think of his being there all this while!" exclaimed Mr. Damon, as he and Ned leaped from their machine. "If he only is there!" murmured the young bank clerk. "What do you mean? Didn't the note he threw out say he was there?" "Yes, but something may have happened in the meanwhile. Those plotters, if they'd do a thing like this, are capable of anything. They may have kidnapped Tom again." "Anyway, we'll soon find out," murmured Ned, as they advanced toward the ruin, Mr. Damon and the farmer each armed with an axe helve, while Ned carried the blacksmith's sledge.