"I guess not. I'll call you when we need you."
Ken climbed the stairs of the 6-story building, which was the highest in Mayfield. He came out on the frozen surface of the roof and looked into the distance. The mounted invaders were circling like Indians about several blocks of houses, firing steadily at the defenders and hurling incendiaries at the houses.
Then, as Ken turned his eyes to the northern end of the valley, he felt as if the whole world had suddenly fallen to pieces in the dim, morning light.
On foot, a vast host of the invaders moved toward the northern defenses of the town. Instantly, he understood their strategy. While their small parties of mounted attackers had pressed the southern defenses, giving the impression they intended to make their major approach there, the bulk of their forces had marched entirely around Lincoln's Peak and come upon the northern boundary at night. That was why the peak had been so heavily guarded against the scouts.
It had been a march of over 40 miles to by-pass the valley. Now, however, the nomads were in a position to achieve their goal. The bulk of the town's defense was concentrated in the south. Little stood in the way of the horde advancing from the north.
His heart sickened as he saw them rip through the barbed-wire enclosure. The poorly manned defense posts seemed almost non-existent. Only a scattering of shots was thrown at the invaders.
From somewhere, a warning siren sounded, the agreed-upon signal to indicate invasion in that sector. It was far too late for that, Ken thought. The horde was already in the streets, fanning out, dispersing in the deserted streets.
Ken started for the doorway leading from the roof. His responsibility to College Hill was gone now. Every man in the valley was fighting for his own life. If that battle were lost, College Hill would be only an empty symbol, where ghosts were housed, as in Berkeley, as in Chicago, as in a thousand centers of learning the world around.
With his hand on the latch of the door he paused at a new sound that broke upon the air. An incredible barrage of firing was occurring along northern Main Street near 12th Avenue. He put the fieldglasses to his eyes again and watched the scattering nomads seeking cover. Dozens of them lay where they fell headlong in the streets.
Ken strained his eyes to see where the defense had come from. It was centered in the houses and buildings that lined the streets, and on their rooftops. He could see the ant-sized outlines of figures on those roofs. For a moment he failed to understand. Then he felt a choking sensation in his throat.