And now he swung the pointer--upon the plate--anywhere!--and the noise from beyond told instantly of the current's passage. He held it an instant, then pushed it back to the silent spot--a dash! A quick return that flashed back again to bring silence--a dot! More dashes and dots ... and McGuire thanked a kindly heaven that had permitted him to learn the language of the air, while he cursed his slowness in sending. Would it reach? Would there be anyone to hear? No certainty; he could only flash the wild Morse symbols out into the night. He must try to get word to them--warn them! And "Blake," he called, and spelled out the name of their field, "warning--Venus--" "Hold them!" he yelled to Sykes at the sound of rushing feet. "Keep them off as long as you can!" "... Prepare--for invasion. Blake, this is McGuire...." Over and over, he worked the swinging pointer into symbols that might in some way, by some fortunate chance, help that helpless people to resist the horror that lay ahead. And while heavy bodies crashed against the door that Sykes was holding, there came from some deep-hidden well of memory an inspiration. There was a man he had once met--a man who had confided wondrous things; and now, with the knowledge of these others who had conquered space, he could believe wholly what he had laughed and joked about before. That man, too, had claimed to have travelled far from the earth; he had invented a machine; his name-- The pointer was swinging in frenzied haste to spell over and over the name of a man, and the name, too, of a forgotten place in the mountains of Nevada. It was repeating the message; then finished in one long crashing wail as a cloud of vapor shot about McGuire and his hand upon the pointer went suddenly limp. CHAPTER XI Captain Blake's game of solitaire had become an obsession. He drove himself to the utmost in the line of duty, and, through the day, the demands of the flying field filled his mind to forgetfulness. And for the rest, he forced his mind to concentrate upon the turn of the cards. He could not read--and he must not think!--so he sat through long evenings trying vainly to forget. He looked up with an expressionless face as Colonel Boynton entered the room. The colonel saw the cards and nodded. "Does that help?" he asked, and added without waiting for an answer, "I don't like cards, but I find my mathematics works well.... My old problems--I can concentrate on them, and stop this eternal, damnable thinking, thinking--" There was something of the same look forming about the eyes of both--that look that told of men who struggled gamely under the sentence of death, refusing to think or to fear, and waiting, waiting, impotently. Blake looked at the colonel with a carefully emotionless gaze. "It's hell in the big towns, I hear."