"If I get a boy now," thought Mr. Tolman, "Glascow will be sure to come and bring the book while I am out." In almost exactly two weeks from the date of the last renewal of the book, P. Glascow came in. It was the middle of the afternoon, and Mr. Tolman was alone. This investigator of musical philosophy was a quiet young man of about thirty, wearing a light-brown cloak, and carrying under one arm a large book. P. Glascow was surprised when he heard of the change in the proprietorship of the library. Still, he hoped that there would be no objection to his renewing the book which he had with him, and which he had taken out some time ago. "Oh, no," said Mr. Tolman, "none in the world. In fact, I don't suppose there are any other subscribers who would want it. I have had the curiosity to look to see if it had ever been taken out before, and I find it has not." The young man smiled quietly. "No," said he, "I suppose not. It is not every one who would care to study the higher mathematics of music, especially when treated as Dormstock treats the subject." "He seems to go into it pretty deeply," remarked Mr. Tolman, who had taken up the book. "At least, I should think so, judging from all these calculations, and problems, and squares, and cubes." "Indeed he does," said Glascow. "And although I have had the book some months, and have more reading time at my disposal than most persons, I have only reached the fifty-sixth page, and doubt if I shall not have to review some of that before I can feel that I thoroughly understand it." "And there are three hundred and forty pages in all!" said Mr. Tolman, compassionately. "Yes," replied the other. "But I am quite sure that the matter will grow easier as I proceed. I have found that out from what I have already done." "You say you have a good deal of leisure?" remarked Mr. Tolman. "Is the musical business dull at present?" "Oh, I'm not in the musical business," said Glascow. "I have a great love for music, and wish to thoroughly understand it. But my business is quite different. I am a night druggist, and that is the reason I have so much leisure for reading." "A night druggist?" repeated Mr. Tolman, inquiringly. "Yes, sir," said the other. "I am in a large downtown drug store which is kept open all night, and I go on duty after the day clerks leave." "And does that give you more leisure?" asked Mr. Tolman. "It seems to," answered Glascow. "I sleep until about noon, and then I have the rest of the day, until seven o'clock, to myself. I think that people who work at night can make a more satisfactory use of their own time than those who work in the daytime. In the summer I can take a trip on the river, or go somewhere out of town, every day, if I like."