The men's eyes followed the pointing hand to see only the sullen black of unlit clouds. The last distant aircraft had vanished from the skies; not a ship was in the air--only the enveloping blanket of high-flung vapor that blocked out all traces of the heavens. And then!-- The cloud banks high in the skies flashed suddenly to dazzling, rolling flame. The ground under their feet was shaken as by a distant earthquake, while, above, the terrible fire spread, a swift, flashing conflagration that ate up the masses of clouds. "What in thunder--" McGuire began; then stopped as he caught, in the light from above, the reflection of fierce exultation in the eyes of the scarlet one. The evil, gloating message of those eyes needed no words to explain its meaning. That this cataclysm was self-made by these beings, McGuire knew, and he knew that in some way it meant menace to him and his. Yet he groped in thought for some definite meaning. No menace could this be to himself personally, for he and Sykes stood there safe in the company of the councilor himself. Then the threat of this flaming blast must be directed toward the earth! * * * * * The fire vanished, and once more, as Professor Sykes had seen on that night so long ago, the blanket of clouds was broken. McGuire followed the gaze of the scientist whose keen eyes were probing in these brief moments into the depths of star-lit space. "There--there!" Sykes exclaimed in awe-struck tones. His hand was pointing outward through the space where flames had cleared the sky. A star was shining in the heavens with a glory that surpassed all others. It outshone all neighboring stars, and it sent its light down through the vast empty reaches of space, a silent message to two humans, despondent and heartsick, who stared with aching eyes. Lieutenant McGuire did not hear his friend's whispered words. No need to name that distant world--it was Earth! Earth!... And it was calling to its own.... There was a flying-field--so plain before his mental eyes; men in khaki and leather who moved and talked and spoke of familiar things ... and the thunder of motors ... and roaring planes.... Some far recess within his deeper self responded strangely. What now of threats and these brute-things that threatened?--he was one with this picture he had visioned. He was himself; he was a man of that distant world of men; they would show these vile things how men could meet menace--or death.... His shoulders were back and unconsciously he stood erect. The scarlet figure was close beside them in the dusk, his voice vibrant with a quality which should have struck fear to his captives' hearts as he ordered them on. But the look in his crafty eyes changed to one of puzzled wonder at sight of the men.