内容简介：
For gracious sake what's that racket? exclaimed Dick Rover, as he threw down the newspaper he was reading and leaped to his feet. "Sounds to me as if there was a battle royal going on," returned his younger brother, Sam, who was at a desk in the library of the old farmhouse, writing a letter. "It's those boys " exclaimed Tom Rover, as he tossed aside a copy of a comic paper which he had been looking over. "I'll wager they're up to some mischief again." "Well, if they are your boys, Tom, you mustn't find fault with them," answered Sam Rover, with a twinkle in his eye. "If ever there were chips of the old block, your twins are It with a capital I."