"I wish," said Mr. Gubb wistfully, when he had read the message, "that Miss Syrilla could be here present this week in Riverbank whilst the Carnival is going on." "She would draw a big crowd at twenty-five cents admission," said Mr. Medderbrook. "I was thinking how pleasantly nice it would be for her to enjoy the festivities of the occasion," said Mr. Gubb, but this was not quite true. What he wished was that she could be present to see him in the handsome disguise he had obtained for his work as Official Detective of the Carnival, and which he was now about to don. This, the second day of the Third Riverbank Carnival, opened with a sun hot enough to frizzle bacon, and the ladies in charge of the lemonade, ice-cream and ice-cream cone booths were pleased, while the committee from Riverbank Lodge P.& G. M., No. 788, selling broiled frankfurters (known as "hot dogs"), groaned. It was no day for hot food. But it was grand Carnival weather. The grounds opened at one-thirty and the amateur circus began at two-thirty, but Philo Gubb, the detective, was on the grounds in full regalia by ten o'clock in the morning. Through some awful error on the part of the Chicago costumer, Philo Gubb's regalia had not arrived in time for the first day of the Carnival, so he had absented himself rather than let the crooks and thieves who were supposed to swarm the grounds have an opportunity to become acquainted with his appearance and thus be put on their guard against the famous Correspondence School detective. When the Committee on Organization of the Third Carnival and Circus for the benefit of the Riverbank Free Hospital held its first public mass meeting in Willcox Hall, Philo Gubb had been there. Like all the rest of Riverbank, he was willing to assist the good cause in any way he could, and he had meant to donate his services as official paper-hanger, but a grander opportunity offered. Mr. Beech, the Chairman of the Committee on Peanuts and Police Protection, offered Mr. Gubb the position of Official Detective. Mr. Gubb accepted eagerly. During the weeks of preparation for the Carnival, a thousand plans for getting the better of pickpockets and other crooks passed through Philo Gubb's mind. He finally decided to disguise himself as Ali Baba. He had a slight recollection that Ali Baba had something to do with forty thieves. It seemed an appropriate _alias_. His disguise he ordered from the Supply Department of the Rising Sun Detective Agency, where he bought all his disguises. It consisted of a tall conical cap spangled with stars, a sort of red Mother-Hubbard gown bespattered with black crescents, a small metal tube, and a wand. With the metal tube came several hundred sheets of apparently blank paper, but, when these were rolled into cylinders and inserted in the metal tube for half a minute, characters appeared on the sheets. A child could work the magic tube, and so could Philo Gubb.