"Don't be ungallant, but go and do likewise; for it is all the fashion. I heard Mrs. Van tell old Mrs. Joy that it was going to be a marrying year; so you'll be sure to catch it," answered Rose, reefing her skirts; for, with all his training, Mac still found it difficult to keep his long legs out of the man-traps. "It doesn't look like a painful disease; but I must be careful, for I've no time to be ill now. What are the symptoms?" asked Mac, trying to combine business with pleasure, and improve his mind while doing his duty. "If you ever come back I'll tell you," laughed Rose, as he danced away into the wrong corner, bumped smartly against another gentleman, and returned as soberly as if that was the proper figure. "Well, tell me 'how not to do it,'" he said, subsiding for a moment's talk when Rose had floated to and fro in her turn. "Oh! you see some young girl who strikes you as particularly charming,--whether she really is or not doesn't matter a bit,--and you begin to think about her a great deal, to want to see her, and to get generally sentimental and absurd," began Rose, finding it difficult to give a diagnosis of the most mysterious disease under the sun. "Don't think it sounds enticing. Can't I find an antidote somewhere; for if it is in the air this year I'm sure to get it, and it may be fatal," said Mac, who felt pretty lively and liked to make Rose merry; for he suspected that she had a little trouble from a hint Dr. Alec had given him. "I hope you will catch it, because you'll be so funny." "Will you take care of me as you did before, or have you got your hands full?" "I'll help; but really with Archie and Steve and--Charlie, I shall have enough to do. You'd better take it lightly the first time, and so won't need much care." "Very well, how shall I begin? Enlighten my ignorance and start me right, I beg." "Go about and see people; make yourself agreeable, and not sit in corners observing other people as if they were puppets dancing for your amusement. I heard Mrs. Van once say that propinquity works wonders; and she ought to know, having married off two daughters, and just engaged a third to 'a most charming young man.'" "Good lack! the cure sounds worse than the disease. Propinquity, hey? Why, I may be in danger this identical moment, and can't flee for my life," said Mac, gently catching her round the waist for a general waltz. "Don't be alarmed, but mind your steps; for Charlie is looking at us, and I want you to do your best. That's perfect: take me quite round; for I love to waltz, and seldom get a good turn except with you boys," said Rose, smiling up at him approvingly, as his strong arm guided her among the revolving couples, and his feet kept time without a fault.