Sylvia was reading in her grandfather's library when the bell tinkled. Professor Kelton had few callers, and as there was never any certainty that the maid-of-all-work would trouble herself to answer, Sylvia put down her book and went to the door. Very likely it was a student or a member of the faculty, and as her grandfather was not at home Sylvia was quite sure that the interruption would be the briefest.