Sherman flattened himself against the bottom of the cockpit and fired up and back, once--twice--three times. The plane rocked; the bird let go with a shrill scream, a spurt of blood showing on its chest feathers, and as Sherman straightened up he saw it whirling down, the wings beating wildly, uselessly, the red spot spreading. But he had no time for more than a glance. The other bird was whirling up to the attack beneath him, yelling in quick jerks of sound as though it were shouting a battle-cry. The pistol, half-empty, might too easily miss. Sherman sought the rifle, and at that moment felt the impact of a swift blow on the floor of the plane. The bird understood that he had weapons and was attacking him from beneath to avoid them! The thought that it was intelligent flashed through his mind with a shock of surprise as he leaned over the side, trying to get a shot at his enemy. Beneath the plane he caught a momentary glimpse of the ground again, torn and tortured, and in the center of the devastation the ruins of a farmhouse, its roof canting crazily over a pulled-out wall. The bird dodged back and forth, picking now and then at the bottom of the plane with its armored beak. He leaned further trying to get in a shot, and drew a chorus of yells from the bird, but no more definite result. Bang! Again. Miss. Out of the tail of his eye he saw the line of green leap into being again. Flap, flap went the wings beneath him. Suddenly from below and behind him there rose a deep humming roar, low pitched and musical. Abruptly the screaming of the bird ceased; it dropped suddenly away, its forewings folded, the rear wings spread, glider-like as it floated to the ground. He turned to look in the direction of the sound, and as he turned a great glare of light sprang forth from somewhere back there, striking him full in the eyes with blinding force. At the same moment something pushed the Roamer forward and down, down, down. He could feel the plane give beneath him, but in the blind haze of light his fumbling fingers could not find the stick, and as he fell a wave of burning heat struck his back and the sound of a mighty torrent reached his ears. There was a crash and everything went out in a confusion of light, heat and sound. * * * * * When he recovered consciousness the first thing he saw was a blue dome, stretched so far above his head that it might have been the sky save for the fact that the light it gave had neither glare nor shadow. He puzzled idly over this for a moment, then tried to turn his head. It would not move. "That's queer," thought Herbert Sherman, and attempted to lift an arm. The hands responded readily enough but the arms were immovable. With an effort he tried to lift his body and discovered that he was tightly held by some force he could not feel.