The buildings drew together beneath us. The shouts of the multitude grew faint and died. The luminous point in the west grew larger, and against the sky, now whitened by the rising moon, I saw the dark body between the glow lines, as one sees a ship at sea from a mountain top. Sanson was heading southward, perhaps with the intent of reaching France and rallying the forces of the Federation there. We mounted higher. The forests stretched beneath us. Always we mounted. I cast a glance at Hancock’s face. There was a look on it that boded ill for Sanson. I was trying to remember something that Jones had told me about him, but my own anxious thoughts beat down the elusive memory. I, too, felt that there would be no mercy for Sanson when the accounts were squared. Would anyone have mercy? I saw the answer to that question swiftly, for, looking back, I saw two lanes of airships, strung out behind, like flying geese, converging toward our leadership. Battleplanes, scoutplanes, dark against the brightening heaven, came hot on the chase. They were in pursuit of the common enemy of the human race, and there was none among them, no man in London but had some outrage to avenge. We mounted higher through the bitter cold. My hands were numb, but Hancock kept his wheel, seated there, a grim, immovable, resolute figure. Now we burst into the heart of a fierce, rocking snowstorm, which blotted out the fugitive; but by some instinct Hancock seemed to know his course, and he held it surely till we rose above the storm and saw the glow parallelogram nearer. Sanson rose too. He must have sighted us and resolved to test his endurance against ours. We were in air so rarefied that I was choking for breath. The moon rode high; dawn was not far away. We were rushing toward the sea, which lay, a blur of inky blackness, underneath, edged by the white line of the chalk cliffs of the south shore. We were gaining steadily. [Illustration: The giant jaws upon our aircraft gaped. I saw steel teeth within them ] But Sanson did not mean to cross the Channel. I do not know what new scheme he had conceived; perhaps he meant to turn and seek some English city where he could defy the new order and reorganize the old. He wheeled; and the long line of the pursuing planes, struggling upward, wheeled together, trying to cut off his flight. He mounted still and struck out eastward. But, with a furious downward swoop Hancock drove in toward him. I could see Sanson sitting at the wheel, his arm still clasping Esther. He stopped in the air and waited for our approach. “What do you want?” he shouted. The tone of Hancock’s voice was implacable. “My son, Sanson,” he answered.