The words were hardly by the Hero's lips when there appeared, noiselessly and amid a great rush of air, a huge metal cylinder that ran upon a sort of truck. It rumbled up to the edge of the platform and from its end a small door was opened. * * * * * Hero Giles exchanged a few sentences with an elderly man who appeared to act as control master, then he indicated the glowing doorway of the cylinder. Firmly clutching his Winchester, Nelson bowed his head and stepped inside, there to discover a luxury he had never anticipated. The interior of the cylinder was brilliantly lit and on both sides were ranged wide divans, strewn with many silken cushions. In a rack nearby were several graceful glass amphora, filled with red and tawny wine. "The cylinder must be about thirty feet long," the marvelling American told himself, "and about ten feet in diameter. Guess it works on the same principle as the compressed air tubes the department stores use to send change with." Gingerly he tested the nearest divan and marvelled at the curious softness of what appeared to be a gigantic tiger skin. Meanwhile Hero Giles entered, his stern features even more serious, but with him was a younger man who resembled him not a little. "Fair brother," said the Atlantean to his companion, "this is he of whom I spoke. Friend Nelson, this is Hero John, my next youngest brother--he, too, speaks the language of the great Sir Henry Hudson." The metallic clang of the door being shut brought a sharp qualm to Nelson's heart. "What are they doing?" he demanded quickly. "The menials bolt the door beyond," explained Hero Giles with amused gravity. "In a moment our cylinder will be placed in the dispatching chamber, where steam pressure will be exerted. We shall then be hurled through this vacuum tube-road to Heliopolis, greatest city of Atlans. In an hour we will be there." Outside sounded the sudden insistent clangor of a gong, and immediately the hiss of steam grew louder. The car shuddered as the hissing rose to an eery scream, then all at once the cylinder leaped forward, nearly hurling Nelson from his seat. He struggled as best he might to gain his equilibrium, for the eyes of the others were on him. Then, more smoothly, the great cylinder gathered speed and hurtled on through the darkness of the tube-road towards Heliopolis, where Victor Nelson would read the book of Fate. CHAPTER IV On the arrival platform at Heliopolis reigned a fierce excitement. Nelson noted countless armed and unarmed warriors hurrying to and fro, desperately intent on reaching their various posts, and snarling ill-temperedly as they elbowed their fellows aside. As soon as they appeared, Hero Giles and his brother became the center of an excited press of gorgeously armored officers. "Hum!" murmured the aviator under his breath. "Something's happened. Must be a revolution, an earthquake or a Democratic convention in town; these boys seem all steamed up."