"Oh, I wasn't going to take the mule along," said Tom, wondering how the creature might behave in the airship. "Not take Boomerang? Den I SUTTINLY ain't goin," and Eradicate walked off, highly offended, to give some oats to his faithful if somewhat eccentric steed. After the airship had been sent off there yet remained much for Tom Swift to do. He had to send along a number of special tools and appliances with which to put the ship together again, and also some with which to repair the craft in case of accident. So that this time was pretty well occupied. But at length everything was in readiness, and with his electric rifle knocked down for transportation, and with his baggage, and that of the others, all packed, they set off one morning to take the train for New York, where they would get a steamer for Africa. Numerous good-bys had been said, and Tom had made a farewell call on Mary Nestor, promising to bring her some trophy from elephant land, though he did not quite know what it would be. Mr. Damon, as the train started, blessed everything he could think of. Mr. Swift waved his hand and wished his son and the others good luck, feeling a little lonesome that he could not make one of the party. Ned was eager with excitement, and anticipation of what lay before him. Tom Swift was thinking of what he could accomplish with his electric rifle, and of the wonderful sights he would see, and, as for the old elephant hunter, he was very glad to be on the move again, after so many weeks of idleness, for he was a very active man. Their journey to New York was uneventful, and they found that the parts of the airship had safely arrived, and had been taken aboard the steamer. The little party went aboard themselves, after a day spent in sight-seeing, and that afternoon the Soudalar, which was the vessel's name, steamed away from the dock at high tide. "Off for Africa!" exclaimed Tom to Ned, as they stood at the rail, watching the usual crowd wave farewells. "Off for Africa, Ned." As Tom spoke, a gentleman who had been standing near him and his chum, vigorously waving his hand to some one on the pier, turned quickly. He looked sharply at the young inventor for a moment, and then exclaimed: "Well, if it isn't Tom Swift! Did I hear you say you were going to Africa?" Tom looked at the gentleman with rather a puzzled air for a moment. The face was vaguely familiar, but Tom could not recall where he had seen it. Then it came to him in a flash. "Mr. Floyd Anderson!" exclaimed our hero. "Mr. Anderson of--" "Earthquake Island!" exclaimed the gentleman quickly, as he extended his hand. "I guess you remember that place, Tom Swift." "Indeed I do. And to think of meeting you again, and on this African steamer," and Tom's mind went back to the perilous days when his wireless message had saved the castaways of Earthquake Island, among whom were Mr. Anderson and his wife.