Mary received a most flattering offer to join the Isburn Detective Bureau in Boston. Mr. Irving Isburn, the proprietor of the world-wide known agency, had for more than fifty years been engaged in solving mysteries and apprehending offenders against the law. His success had been phenomenal, and if his agency had been called “The Scotland Yard of America” it would have been a derogation rather than a compliment. He had surrounded himself with the most expert men and women in the profession, and in a letter to Mr. Dana he said he considered Miss Dana would be a most important and valuable acquisition to his staff. Mr. Dana, however, decided that Mary was too young to start business life, so she was sent to Boston to boarding school for a year. At the expiration of that time she joined Mr. Is burn's staff, and soon that gentleman wrote her father that in certain lines of investigation she was unexcelled. With the coming of autumn, after Bob Wood's release, Quincy and Tom started in on their four years at Harvard. They had passed their entrance examinations without conditions, so the few days in the last of September, spent so anxiously by many of the freshman class in trying to make up conditions given them the spring before, allowed Quincy and Tom to live in Arcady until the portals of the temple of learning were ajar. Rooms were engaged at Beck Hall, and the young men began their inspection of the classic city on the Charles. “This city is on the square,” remarked Tom. “Lafayette, Central, Putnam, Harvard, Brattle, and some more on the East side I suppose.” “The college is on the square too,” said Quincy, “as long as Dr. Eliot is Prexie.” College life has been depicted many times in books, and Quincy and Tom's four years probably contained few events that had not had their counterparts in the lives of other young Harvard men. They joined many clubs and societies the initiation ceremonies being, in reality, a mild form of hazing. Quincy and his chum were not goody-goody boys, but they had mutually pledged each other that they would lead temperate lives and refrain from all dissipation that would prejudice their standing as students. Quincy saw Mary frequently, and, after she was employed by Mr. Isburn, they talked over some of the most interesting of Mary's cases. In their college life, Tom and Quincy were unsuspecting, and became the butt of many good-natured and some unkind jokes. On one occasion they were invited to join a theatre party. It was a variety or vaudeville show and ended with a pantomime, the closing scene in which was a skating carnival. When the skaters came on, the members of the theatre party rose in their seats and pelted the performers with paper snowballs made hard by the liberal use of paste. The police were called in. Quincy and Tom had taken no part in the snowballing but, as examination showed their pockets were full of the substitutes for the natural product, they were adjudged as guilty as the others.