They were closing on the gyropters. Then a line of light blazed from one of the straight-winged aircraft, followed a second or two later by a sound, a deep crack. But the shell never reached its target, the crippled gyropter, because in the same instant as they saw the light, and before they heard the crack, the watchers on the mountain saw a flash from the intention craft, and a shell exploded in midair.
Mrs. Coulter had hardly time to understand that almost instantaneous sequence of light and sound before the battle was under way. Nor was it at all easy to follow, because the sky was so dark and the movement of every flier so quick; but a series of nearly silent flashes lit the mountainside, accompanied by short hisses like the escape of steam. Each flash struck somehow at a different raider: the aircraft caught fire or exploded; the giant bird uttered a scream like the tearing of a mountain-high curtain and plummeted onto the rocks far below; and as for the angels, each of them simply vanished in a drift of glowing air, a myriad particles twinkling and glowing dimmer until they flickered out like a dying firework.
