"Not a word!" he repeated to the radio man. "You will keep mum on this." He took McGuire with him as he left to seek out his colonel. But it was a disturbed and shaken man, instead of the cool, methodical Captain Blake of ordinary days, who went in search of his commanding officer. And he clung to McGuire for corroboration of his impossible story. * * * * * There was a group of officers to whom Blake made his full report. Colonel Boynton had heard but little when he halted his subordinate curtly and reached for a phone. And his words over that instrument brought a quick conference of officers and a quiet man whom McGuire did not recognize. The "brass hats," as Blake had foreseen, were avid for details. The pilot of the incoming plane was there, too, and the radio man. Their stories were told in a disconcerting silence, broken only by some officer's abrupt and skeptical question on one point and another. "Now, for heaven's sake, shut up about Venus," McGuire had been told. But he did not need Captain Blake's warning to hold himself strictly to what he had seen and let the others draw their own conclusions. Lieutenant McGuire was the last one to speak. There was silence in the office of Colonel Boynton as he finished, a silence that almost echoed from the grim walls. And the faces of the men who gathered there were carefully masked from any expression that might betray their thoughts. It was the quiet man in civilian attire who spoke first. He sat beside another whose insignia proclaimed him of general's rank, but he addressed himself to Colonel Boynton. "I am very glad," he said quietly, "very glad. Colonel, that my unofficial visit came at just this time. I should like to ask some few questions." Colonel Boynton shifted the responsibility with a gesture almost of relief. "It is in your hands. Mr. Secretary," he said. "You and General Clinton have dropped in opportunely. There is something here that will tax all our minds." The man in civilian clothes nodded assent. He turned to Captain Blake. "Captain," he said, "you saw this at first hand. You have told us what you saw. I should like greatly to know what you think. Will you give us your opinion, your impressions?" * * * * * The captain arose smartly, but his words came with less ease. "My opinion," he stated, "will be of little value, but it is based upon these facts. I have seen to-night, sir, a new type of aircraft, with speed, climb and ceiling beyond anything we are capable of. I can only regard it as a menace. It may or may not have been armed, but it had the size to permit the armament of a cruiser; it had power to carry that weight. It hung stationary in the air, so it is independent of wing-lift, yet it turned and shot upward like a feather in a gale. That spells maneuverability.