One night, either because his nerves chanced to be a little more nearly on edge than usual or because the Siren chanced to be in good working order, the sounds which came from the outer harbor seemed to Hannibal more than ordinarily loud and mournful and appalling. He raged helplessly. "What need of so much noise, and such a noise!" he fumed, but, sobering in temper with reflection, tried to content himself with muttering resignedly: "I suppose it's necessary that the thing should be heard as far away as possible,"--then checked his muttering suddenly. The sentence in the scientific periodical had recurred to him. "It is a well known fact that a musical sound can be heard distinctly at a greater distance than an unmusical one." He rose from his bed and sat silent, with wrinkled brow. Gradually the wrinkles disappeared and a light came into the young man's eyes. He sprang to his feet, giving vent as he did so to the single, all unstudied, expression "B'gosh!" He had learned it when a boy "down East" while working in the fields with the hired man. For the next two weeks Hannibal Perkins did little labor on the farm. His time was spent from daylight to dark in a small lean-to which served the double purpose of woodshed and workship. Then for another week, he was in town studying the mechanism of the great church organs--instruments with which he was already tolerably familiar--and consulting with organ-builders and other craftsmen. The fourth week was spent in the little shop again. It was the beginning of one of the foggiest months in the year that Hannibal Perkins, hat in hand, somewhat abashed, but resolute, entered the office of the mayor of the city. He looked curiously upon the man seated at his desk. He saw a person of apparently strong physique, but thin and pale and with glittering eyes, the eyes of a victim of insomnia. The mayor wheeled about in his chair. "What do you want?" he asked peevishly. It was not a pleasant reception but, as a matter of fact, the man ordinarily affable was nervous and consequently irritable. Hannibal resolved not to appear abashed. "It's about the Siren," he said. "What!" The mayor was all interest now. "What about the Siren?" "I want to suggest a means for getting rid of the awful sounds which come over the water every night; to get rid of them so that the people of this city can sleep again." The mayor stared at his visitor for a moment or two and then spoke solemnly: