Out of the myriads of hives were flying the people of all the Gens of Earth, their vast numbers already darkening the roof of the world. The advance fires from Mars seemed to have no effect on them, which Sarka had expected, since the fires seemed to consume nothing they had touched previously. * * * * * By millions the people came forth. People dressed in the clothing of this Gens or that, wearing each the insignia of the house of his Spokesman. A brave show. Sarka could see the faces of many, now in light, now in shadow, as the advance fires of Mars lighted them for a moment in passing, then left them in shadow as the bursting balls of fire faded and died. Strange, too, that the fireballs made no noise. Noiseless flame which rebounded from the surface of the Earth broke in silence, deluging the heavens with shooting stars of great brilliance. Through its display flew the people of the Gens, mustering in flight above flight, each to his own level, under command of the Spokesmen of the Gens. "How long, father," queried Sarka, "should it take to empty the Gens areas?" "The people of Earth have been waiting for word to go into battle since we first sent the people of Dalis against the Moon-men. They still are ready! The dwellings of our people, _all_ of them, can be emptied within an hour!" "I wonder," mused Sarka, "if that is soon enough!" Perhaps yes, perhaps no. It would be a race, in any case. Sarka divided his attention between the rapidly changing formations of the Moon-cubes in that devasted area and the onrushing charge of the fire-balls from Mars. All were visible to him through the Master Beryl, and from the Observatory, though the Martian fire-balls were now so close that the vanguard of them could even be seen in the Master Beryl, adjusted to view only activities on the surface of the Earth. Even as the last flights of the Gens of Earth were slipping into the icy air from the roof of the world, the Moon-cubes began their terrifying, appalling attack, every detail of which could be seen by Sarka from the Master Beryl. * * * * * Those columns, composed of cubes, seemed to be the leaders of a vast cube-army. The top of each of them was a gleaming globe whose eery light played over the country immediately surrounding each column, their weird light reflected in the squares, rectangles and globes that other cubes had formed. Sarka sought swiftly among the columns for the one which might conceivably be in supreme command; but even as he sought the Moon-cubes moved to the attack. The globes on the tops of the columns dimmed their lights, and the squares, rectangles and globes got instantly into terrible motion. Southward from the position in which they had formed they began to move, the squares and rectangles apparently sliding along the surface of the scarred and broken soil, the globes rolling.