ight with breathless waiting.

He must face the big brute about, and his wild yell did the work.
Startled by that cry that must have reached even those calloused, savage
nerves, the ape-man leaped straight up in the air. He whirled as he
sprang, to face whatever was behind him, and he threw the bodies of
Harkness and Diane to the ground.

Chet saw the black ugliness of the face; he saw the eyes swing toward
him.... But he was following with his own narrowed eyes a spot on a
hairy throat; he even seemed to see within it where a great carotid
artery carried pumping blood to an undeveloped brain.

The glare of those eyes struck him like a blow: his own were drawn
irresistibly into that meeting of glances that would freeze him to a
rigid statue--but the twang and snap of his own bowstring was in his
ears, and a hairy body, its throat pierced in mid-air, was falling
heavily to the ground.

But Chet Bullard, even as he leaped to the side of his companions, was
thinking not of his victory, nor even of the two whose lives he had
saved. He was thinking of some horror that his mind could not clearly
picture: it had found them; it had seen them through this ape-man's eyes
before the arrow had closed them in death ... and from now on there
could not be two consecutive minutes of peace and happiness in this
Happy Valley of Diane's.

CHAPTER XVIII

_Besieged!_

"I've felt it for some time," Chet confessed. "I've wakened and known I
had been dreaming about that damnable thing. And, although it sounds
like the wildest sort of insanity, I have felt that there was
something--some mental force--that was reaching out for our minds;
searching for us. Well, if there is anything like that--"

He was about to say that the trail made by Kreiss and the apes who
tracked him would have given this other enemy a direction to follow, but
Kreiss himself dropped down beside Chet where he and Walt sat before the
front of Diane's shelter. The pilot did not finish the sentence. Kreiss
had meant it for the best; there was no use of rubbing it in. But that
thing in the pyramid would never be fooled as Schwartzmann and the apes
had been.

Chet had told Kreiss of the attack and had shown him the body of the
ape-man. "Council of war," he explained as Kreiss rejoined them, but he
corrected himself at once. "No--not war! We don't want to go up against
that bunch. Our job is to plan a retreat."

Harkness turned to look inside the hut. "Diane,