All the proud thousands of the defense fleet were gone, blown to fragments by the time bombs from above. The city was hidden in a thick, muddy-yellow fog. "Queer," the thought ran through his brain, "that there should be fog in mid-afternoon, under a blazing sun." Then he saw them, the circling black ships of the enemy, trailing behind them long wakes of the drab yellow vapor that drifted heavily down to shroud New York with--gas! Allan felt nauseated as he imagined a fleeting picture of the many-leveled city, of its mist-darkened streets with swarming myriads of slumped bodies clogging the conveyor belts that still moved because no hand was left to shut them off; of women and children, and aged or crippled men strewn in tortured, horrible attitudes in all the roof-parks, in their homes, in every nook and cranny of the murdered city. He looked beneath his drifting descent and saw roads that were rivers, alive with every manner of fleeing conveyance, and he groaned, knowing that in moments the pursuing ships would send down their lethal mist to put an end to that futile flight. Sugar Loaf Mountain rose toward him. At its very summit was a clearing among the trees, and, incongruously motionless in that world where every one was rushing from inescapable death, a man stood calmly there, gazing up at him. Allan screamed down to him! "Run! You fool. Run or the gas will get you!" Of course the man could not hear that cry, but one tiny arm rose and pointed south. Allan followed the direction of the gesture and saw a black plane veering toward him. Then orange flared from it, though it was distant, and a wave of intolerable heat enveloped him. Something cried within him: "Too far--he's too far off to kill me with his beam!" Then he knew no more. * * * * * From New York, from devastated San Francisco, from Rio, from Buenos Aires, from fifty other desolated points along the seaboards of the Americas, the black fleets swept along the coasts and inland, vomiting their yellow death till all the continents were blanketed with life-destroying gas. And in Europe and Australasia the destroying hordes, having smashed the proud defenses of the coastlines, engaged in the same pursuit, till in one short week all the lands of the Western Allies were swept clear of life. Then the Eastern ships turned homeward, to wait until the vapor they had strewn had lost its virulence, and the teeming masses of the East might take possession of the half world the ebony-painted destroyers had conquered. The black fliers turned homeward, but there was no homeland left for them to seek! For though the defense fleets of the Western Coalition had been everywhere beaten, their attack squadrons had been everywhere successful. All Asia and Africa lay under a pall of milky emerald gas as toxic, as blasting, as the Easterners' yellow. And the Westerners were returning too!