Beyond him, coming through the green smother of grass that was now as high as her waist, was Diane. Even at a distance Chet could see the unnatural paleness of her face; she was running fast, coming along the trail they had all helped to make.

Chet hit the ground on all fours and reached for the long bow with which he had become so expert; then followed Harkness who was racing to meet the girl.

"An ape!" she was saying between choking breaths when Chet reached them. "An ape-man!" She was clinging to Harkness in utter fright that was unlike the Diane he had known.

"Towahg," Harkness suggested; "you saw Towahg!" But the girl shook her head. She was recovering something of her normal poise; her breath came more evenly.

"No! It was not Towahg. I saw it. I was hidden under the big leaves. It was an ape-man. He came swinging along through the branches of the trees: he was up high and he looked in all directions. I ran. I think he did not see me.

"And now," she confessed, "I am ashamed. I thought I had forgotten the horror of that experience, but this brought it all back.... There! I am all right now."

Harkness held her tenderly close. "Frightened," he reassured her, "and no wonder! That night on the pyramid left its mark on us all. Now, come; come quietly."

He was leading the girl toward the knoll that they all called home. Chet followed, casting frequent glances toward the trees. They had covered half the distance to the barricade when Chet spoke in a voice that was half a whisper in its hushed tenseness.

"Drop—quick!" he ordered. "Get into the grass. It's coming. Now let's see what it is."