Shouting "Stop thief" at the top of his voice he raced off in the direction the newsboy had run, and Ben lost no time in taking to his heels in the opposite direction.

After doubling round several corners and then doubling on his own trail round another block he felt reasonably secure he had given the inventor the slip and, hailing a cab, was driven to the station. He was fortunate in securing a train to New York without having to wait more than five minutes, and late that night the Chester boys and the others of their party were in full possession of the details of the air-ship in which Luther Barr meant to overreach them if it lay within his power.

CHAPTER XV.

OFF FOR THE SARGASSO.

The knowledge that Luther Barr's air-ship was so nearly ready to start on the expedition which Sanborn's treachery had suggested to the old millionaire, acted as a spur to the boys in making their final arrangements. By starting from Galveston itself they saved the necessity of laying in a large stock of supplies in New York, so that when two days later "good-byes" having been said and last parental warnings issued—their only equipment beside their personal belongings were the boxes containing the sections of the Golden Eagle and the pontoons. The coverings had not been removed from the aeroplane's surfaces, but they had been packed, covered as they were. There was a reason for this, as lacing on the coverings at sea, even with the additional stability the boys hoped to secure by the use of the pontoons, would have been a tedious or even perhaps an impossible task. The wings, therefore, which joined at the center of the aeroplane, above the chassis, were packed in four sections measuring twenty-eight feet each. These sections Frank planned to carry in the cabin of the Bolo where they would be out of harm's way.

Five days later the adventurers reached the flat, uninteresting city of Galveston and lost no time in making immediate preparations for a start. Frank found that the agent had followed his instructions to the letter, and the galley shelves of the Bolo were filled with small articles to be used in cooking, and that flour bins, sugar and other receptacles had been well stocked. Besides all this there was a plentiful supply of such staples as beans, onions, potatoes, bacon, coffee, tea and a big stock of canned meats and vegetables. Their weapons were the boys' own armory, and Harry put in the best part of a day constructing neat racks in the cabin, which, when the various rifles and shotguns were hung in place, gave the little chamber a very businesslike appearance. The cabin was twenty-nine feet long, and the wings of the Golden Eagle were therefore a snug fit when suspended on slings from the cabin roof. The aeroplane engine was also placed in the cabin. The framework and other less perishable parts of the Golden Eagle, as well as the pontoons, were placed outside on the cabin roof, securely lashed down and covered with waterproof tarpaulin.

In the space under the cabin floor was stored an extra heavy anchor for use in emergency, in addition to the two fifty-pound mud-hooks the Bolo regularly carried. The boys noted with satisfaction that the booms on which the Bolo spread her auxiliary sails were lengthy affairs and would readily lend themselves to use as derricks when the time came to hoist the various parts on the Golden Eagle overboard into the floating erection base. The Bolo also carried a twelve-foot, high-sided dory, almost as seaworthy, despite her diminutive size, as the larger vessel. Under the cockpit seats were reserve tanks for gasolene and water, and beneath the cabin floor and in the bow were additional receptacles for fuel. Besides this supply the boys laid in a stock of five-gallon cans of gasolene, which were distributed wherever they would fit in on the little craft; some even being lashed on deck alongside the cabin.

The transportation of so much inflammable matter naturally called for the greatest caution, and, much to the disappointment of Ben Stubbs, who had insisted on joining the expedition, and Bluewater Bill, Frank absolutely forbade smoking aboard the craft. Nor was anybody allowed to carry matches. The only lucifers aboard were locked in the galley under Frank's sole charge. However, they all agreed that no precautions could be too stringent on a craft so laden with inflammables and explosives as was the Bolo.

The night before they were to sail, the boys slept on board. The Bolo's cabin was equipped with folding Pullman berths and also with transoms. Each berth held two, and the transoms accommodated the same number, so that eight could sleep comfortably aboard the little craft. Early the next morning, while the appetizing aroma of coffee and frizzling bacon filled the cabin from Ben's galley, a youthful news peddler wandered on to the dock and took up his place with other curious persons; for the equipping of the Bolo had made quite a stir among the water-front loungers of Galveston. The lad insisted on throwing a paper on board for "good luck," he said. Frank, who was out in the cockpit at the time re-stowing some cases of gasolene, threw the boy a coin and thought no more of the paper till, as they were discussing Ben's breakfast, he idly glanced over its front page.

"Mysterious Air-ship," was the heading that instantly caught his eye and caused him to set down his cup of coffee untasted. Reading the article he found even more matter to hold his attention. The item was dated Miami, Fla., and read as follows: