opened the door. "Tell Mr. Hennessey right away." The boys had not a moment to wait before a large man with a genial face and outstretched hand came forward. "I'm glad to see you, Mr. Carlton," he said. "I'm Hennessey, the superintendent. Possibly you may have heard your father speak of me; I have been helping him make sugar for twenty years." Bob smiled up into the eyes of the big man looking down at him. "Indeed Dad has spoken of you, Mr. Hennessey," he said, returning the hearty hand-shake. "He depends on you a lot. He says he always feels sure that when you're on the job everything will be all right." Mr. Hennessey flushed with pleasure. "I merely try to run your father's place as if it were my own," was the modest rejoinder. "That's just it--that's why Father feels he can go to the North Pole if he wants to and not worry while he's gone," nodded Bob. "I think it is mighty good of you to bother with my chum and me. Can't you send some one to take us through the refinery? There is not the slightest need for you to go with us yourself." "Oh, I wouldn't think of turning you over to some one else. You see I am interested in your sugar education; I can't allow the boss's son to get a wrong start in the business," laughed Mr. Hennessey. "I'm afraid I'm not starting in the business," protested Bob, shaking his head deprecatingly. "I'm only trying to learn a little something about Dad's job, so I can be a bit more intelligent about it." "You're going to investigate the way your father earns his money, eh?" chuckled the superintendent. "Well, I'll tell you right now you need do no blushing for your father's business methods; he makes his fortune as cleanly and honestly as any man could make it." "I'll take a chance on Dad," was the laconic response. "You can do so with safety." There was a pause and turning Bob introduced Van Blake. Then after the two boys had been provided with duck coats so that none of the sticky liquid that sometimes dripped from the machinery should spot their clothing the three set out for the basement of the factory, where the incoming cargoes of sugar were unloaded. Here