"You were left here in command of the settlement and in charge of the fleet. You were ordered to permit no vessel to leave the valley till the flagship returned. One of them was seen crossing the Mediterranean in a northerly direction three days ago. Either you are a traitor, or that vessel is in the hands of traitors. Explain." Nicholas Roburoff remained silent for a few moments. His breast heaved once or twice convulsively, as though he were striving hard to repress some violent emotion. Then he drew himself up like a soldier coming to attention, and, looking straight in front of him, told his story briefly and calmly, though he knew that, according to the laws of the Order, its sequel might, and probably would, be his own death. "The night of the day on which the flagship left the valley was visited by a violent storm, which raged for about four hours without cessation. We had no proper shelter but the air-ships, and so I distributed the company among them. "When nearly all had been provided for, there was one vessel left unoccupied, and four of the unmarried men had not been accommodated. They therefore took their places in the spare vessel. They were Peter Tamboff, Amos Vornjeh, Ivan Tscheszco, and Paul Oreloff, all Russians. "We closed the hatches of the vessels, and remained inside till the storm ceased. When we were able to open the hatches again, it was pitch dark--so dark that it was impossible to see even a yard from one's face. Suspecting no evil, we retired to rest again till sunrise. When day dawned it was found that the vessel in which the four men I have named had taken shelter had disappeared. "I at once ordered three vessels to rise and pass through the defile. On the outside we separated and made the entire circuit of Aeria, rising as high as the fan-wheels would take us, and examining the horizon in all directions for the missing vessel. "We failed to discover her, and were forced to the conclusion that the deserters had taken her away early in the night at full speed, and would, therefore, be far beyond the possibility of capture, as we possessed no faster vessel than the missing one. So we returned. That is all." "Go to the forward cabin and remain there till you're sent for," said Natas. The President instantly turned and walked mechanically through the door that was opened for him by one of the sentinels. The other went in front of him, the second behind, closing the door as he left the saloon. A brief discussion took place between Natas and his two lieutenants, and within a quarter of an hour Nicholas Roburoff was again standing at the end of the table to hear the decision of his judges. Without any preamble it was delivered by Natas in these words--