So three evenings that week, in spite of her distaste for minor parts and bad pianos, she meekly drummed out waltzes and two-steps on Mrs. Chapin's rickety instrument for a long half hour after dinner, while Betty and Roberta--who danced beautifully and showed an unexpected aptitude in imparting her accomplishment--acted as head-masters, and the rest of the girls furnished the novices with the necessary variety of partners, practiced "leading," and incidentally got better acquainted. On Friday evening, as they sat in the parlor resting and discussing the progress of their pupils and the appalling length of the Livy lesson for the next day, Eleanor broached the subject of the class-meeting.