So far as he was concerned he was satisfied. He knew that a mistake was impossible to the finished science of the Martian astronomers, compared with whom he was but as a little child in knowledge. But still he kept his own counsel, for there was no need for him to cast the sudden shadow of death over the rejoicings of his countrymen. At length the fleets departed, and Aeria, armed at all points, was awaiting the possible onslaught of her foes. These she would doubtless hurl back in triumphant disdain from her bulwarks, but far, far away in the depths of space, beyond even the range of the great equatorial on Mount Austral, there was approaching an enemy whose assault men could only meet with resignation or despair, as the case might be. Resistance was as much out of the question as escape. Early on the morning of the 16th, soon after the _Avenger_ had struck the first blow in the world-war, Vassilis presented himself at the President’s palace and asked for an interview with him. The President received him a few minutes later in his private room. It was the first time in his life that the silent, reserved astronomer had ever asked for an official interview, and as the President entered the room he held out his hand, saying-- “Good morning, Vassilis. We have seen very little of you lately, even less than usual. Have you come to see me about the work which has kept you from joining in the general rejoicings? I’m sure it must have been very important.” “Yes, President, it was--the most important that a terrestrial student of astronomy could be engaged upon,” replied Vassilis, speaking slowly and very gravely. The President looked curiously for a moment into his clear, thoughtful eyes, and noticed the lines of care on his pale, worn features, so different to those of the rest of his countrymen. Then he said, with an anxious ring in his voice-- “What is the matter, Vassilis? You look worn and ill, as though you had just passed through some great sorrow. Have you been keeping too long vigils with the stars? Tell me, what is it?” Vassilis was silent for a moment as though he might have been wondering whether the President, strong as he was, would have strength to bear the blow that he must strike in his next sentence. The awful news had come to him slowly, sign by sign and word by word, and so he had been in a measure prepared for it when its full meaning became clear. But upon Alan Arnold it must fall at a single stroke. Still the words had to be spoken, and after a good minute’s pause he said-- “President, I bring you the most terrible news that one man can bring to another. The Master’s prophecy is about to be fulfilled. Three nights ago I received through the photo-telegraph what I believe to be the death-sentence of humanity upon earth. Here is the transcript of the message.”