"That is why," struck in Dr. von Hofe, "I came to you. 'Schoverling,' they told me, 'he is straight.' It is a good reputation to have, my friend." The boys nodded, understanding. A look of gratification crossed the explorer's face, such gratification as comes to a man when he knows that he has won the esteem of other men. "We are not looking for hot water and sea serpents," went on the doctor with a broad smile at the boys. "We are looking for elephants, let us remember, please!" With that, the topic of Lake Quilqua was promptly dropped. At Ras al Kyle, Selim ben Amoud went ashore--this time wearing sandals and burnous--and the _Mombasa_ took up her interrupted journey south. But late that night, as the boys swung into their bunks, Jack gave vent to his long-repressed thought. "Chuck, I wish to thunder we were goin' to hunt for that lake!" "Forget it," advised Charlie. "Von Hofe isn't paying expenses for us to chase around after sea serpents. Anyhow, Jack, when you come to think it over it doesn't stand to reason that there's any such place as that. There's a heap of sense in what the General said. I've heard that Injun yarn about the mammoths up north; but you know's well as I do that when it comes down to hard pan there's nothin' to it. Same with this magic lake." "Guess you're right," sighed Jack regretfully, turning out the light. While the boys were turning in, Dr. Gross von Hofe was replying to a certain question put to him by the General, before they retired. "Yes, my friend, it could be. Lieutenant Graetz found just such gigantic buffalo at Lake Bangweolo, and was all but killed by them. He has promised that I shall mount one, when he is able to undertake a second expedition to bring home specimens. But elephants and sea serpents--ach, no! Such a yarn is crazy." "So crazy as a loon," laughed Schoverling, and said good night. CHAPTER IV MAKING READY "Mombasa!" Before them lay the picturesque harbor, filled with Arab dhows from Zanzibar and the Somali ports, tramp steamers, coasters, and a trim French corvette up from Madagascar. Up above the waters rose the old Arab city, now a trim English-ruled town of immense trade, while behind all shimmered the vivid green of trees. "Dandy sight, isn't it!" and the boys turned to find Schoverling at their side, with the doctor. "That old town used to have a sultan, as Zanzibar has, and a gay pirate life was led along the east coast in the days of Captain Kidd. Portugal captured the place, but the Arabs drove her out again. Now England is making Mombasa into a mighty big trading center, and as the Uganda Railway taps the Cape-to-Cairo, which is about done, things are going to boom."