“Elementary, my dear Dr. Watson,” he whispered in reply. “In the trailer, of course.”

Gripping the breadboard in both hands, he made a last weak lunge at the circling Dobermans. They fled, yelping, from this blood-spattered terror.

Then he crawled frantically toward the open trailer door.

Safe inside, and with the door locked behind him, he hung onto a table and stared about him with eyes that were beginning to go out of focus.

He should find a cloth with which to bind up his wound, he knew. But he had no time.

The glittering light-beam mechanism caught his attention. That was the key to the whole situation! It must project a million candle-power, at least, to be seen at Elbow Rock. If he could turn it on Window Rock it would light up the village as bright as day.

There must be a wheel or something by which the light could be moved.... There it was! On the control board to the right!

He twisted the little chrome wheel frantically, watching through a window as he did so. At first his aim was wild. Then, every street and building in Window Rock leaped into view, as though outlined by a lightning stroke.

There! That would tell them something was wrong up here.

He was sleepy and tired after all that effort. So sleepy! He sank into a chair in front of the beam console and pillowed his head on his bloody arms.