She traced the sentence with her forefinger, for Rob's glance to follow: "_Instances of longevity are chiefly among the abstemious_." "Girlie won't have any more idea of what I'm talking about than a jay-bird." To Mary's astonishment, the laugh with which Rob received her confidence was so long and loud it ended in a whoop of amusement, and when he had caught his breath he began again in such an infectious way that the girls up-stairs heard it and joined in. Then Lloyd leaned over the banister to call: "What's the mattah, Rob? You all seem to be having a mighty funny time down there. Save your circus for us. We'll be down in a few minutes." "This is just a little private side-show of Mary's and mine," answered Rob, going off into another peal of laughter at sight of Mary's solemn face. There was nothing funny in the situation to her whatsoever. "Oh, don't tell, Mister Rob," she begged. "Please don't tell. Joyce might think it was impolite, and would put a stop to it. It seems funny to you, but when you think of my whole lovely visit spoiled that way--" She stopped abruptly, so much in earnest that her voice broke and her eyes filled with tears. Instantly Rob's laughter ceased, and he begged her pardon in such a grave, kind way, assuring her that her confidence should be respected, that her admiration of him went up several more degrees. When the girls came down, he could not be prevailed upon to tell them what had sent him off into such fits of laughter. "Just Mary's entertaining remarks," was all he would say, looking across at her with a meaning twinkle in his eyes. She immediately retired into the background as soon as the older girls appeared, but she sat admiring every word Rob said, and watching every movement. "He's the very nicest man I ever saw," she said to herself. "He treats me as if I were grown up, and I really believe he likes to hear me talk." Once when they were arranging for a tennis game for the next morning, he crossed the room with an amused smile, to say to her in a low aside: "I've thought of something to help along the stork's cause. Bring the little fox over to the tennis-court to watch the game. If she doesn't find that sufficiently stupid, and you run short of big words, read aloud to her, and tell her that is what you intend to do every day." Such a pleased, gratified smile flashed over Mary's face that Betty exclaimed, curiously: "I certainly would like to know what mischief you two are planning. You laugh every time you look at each other."