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 swaying bough, he sought in the direction of the eastern horizon for the tiny speck that would be the British plane bearing away from him the last of his own race and kind that he expected ever again to see.

At last his keen eyes picked up the ship flying at a considerable altitude far in the east. For a few seconds he watched it speeding evenly eastward, when, to his horror, he saw the speck dive suddenly downward. The fall seemed interminable to the watcher and he realized how great must have been the altitude of the plane before the drop commenced. Just before it disappeared from sight its downward momentum appeared to abate suddenly, but it was still moving rapidly at a steep angle when it finally disappeared from view behind the far hills.

For half a minute the ape-man stood noting distant landmarks that he judged might be in the vicinity of the fallen plane, for no sooner had he realized that these people were again in trouble than his inherent sense of duty to his own kind impelled him once more to forego his plans and seek to aid them.

The ape-man feared from what he judged of the location of the machine that it had fallen among the almost impassable gorges of the arid country just beyond the fertile basin that was bounded by the hills to the east of him. He had crossed that parched and desolate country of the dead himself and he knew from his own experience and the narrow escape he had had from succumbing to its relentless cruelty no lesser man could hope to win his way to