In the four months since the conference with the Australian Scientific Committee it had been amply demonstrated to the three remaining governments of the world that there was not room for both man and dodos on the same planet. A carefully-worked out campaign had evidently been set in operation by whatever central intelligence led the four-winged birds with the object of wiping human life from the earth. The bombing of Canberra was merely the first blow. While Australia was arming and organizing to meet the menace the second blow fell--on Sourabaya, the great metropolis of Java, which was wiped out in a single night. At this evidence of the hostile intentions of the dodos radio apparatus began to tap in Australia, in the Dutch colonies and in South Africa; old guns forgotten since the last great war, were wheeled out; the factories began to turn out fighting airplanes and the young men drilled in the parks. When, late in November, a flock of twenty-five dodos was observed over north Australia, headed for Sydney, the forces of the defence were on their guard. Long before the birds reached the town they were met by a big squadron of rocket-powered fighting planes and in a desperate battle over the desert, with claw and beak and bomb against machine-gun, were shot down to the last bird. With that the attacks had suddenly ceased, and the federated governments, convinced that it was but the calm before a greater storm, had gathered their strength for a trial of arms. It was realized that whatever lay behind this attempt to conquer all there was left of the old earth must be in some way due to the coming of the great comet and must center somewhere in America, where the comet had struck. So for the first time the race of man began to learn what international cooperation meant. Delegates from the three surviving governments met in conference at Perth with Ben Ruby accorded a place as the representative of the United States. The decision of the conference was to mobilize every man and weapon to attack the birds in America and exterminate them there if possible; if impossible to do this, then to keep them so occupied at home that they would be unable to deliver any counter-attack.