He remounted his motor-cycle, and rode off, the last view he had of the trio being one where they were at the edge of the brook, trying to remove the worst traces of the black fluid. As Tom turned around for a final glimpse, Andy shook his fist at him, and called out something.

"I guess Andy'll have it in for me," mused Tom. "Well, I can't help it. I owed him something on account, but I didn't figure on paying it in just this way," and he thought of the time the bully had locked him in the ballast tanks of the submarine, thereby nearly smothering him to death.

That night Andy Foger told his father what had happened, for Mr. Foger inquired the reason for the black stains on his son's face and hands. But Andy did not give the true version. He said Tom had purposely thrown the bottle of blacking at him.

"So that's the kind of a lad Tom Swift is, eh?" remarked Andy's father. "Well, Andy, I think you will soon have a chance to get even with him."

"How, pop?"

"I can't tell you now, but I have a plan for making Tom sorry he ever did anything to you, and I will also pay back some old scores to Mr. Swift and Mr. Damon. I'll ruin their bank for them, that's what I'll do."

"Ruin their bank, pop? How?"

"You wait and see. The Swift crowd will get off their high horse soon, or I'm mistaken. My plans are nearly completed, but I can't tell you about them. I'll ruin Mr. Swift, though, that's what I'll do," and Mr. Foger shook his head determinedly.

Tom was soon at his home, and Mrs. Baggert, hearing the noise of his machine, as it entered the front yard, came to the side door.

"Where's my blacking?" she asked, as our hero dismounted and untied the bundle of steel tubes he had purchased.