At the first step came a sound which no man born of woman has to hear more than once in order to stand stone-still—a fierce, thick hiss. Stopping dead in his tracks, Will moved slowly back until he was pressing hard against the earthen wall behind him. Even as he stopped, from the half-darkness before him, with a dry clashing of scales, glided into the center of the pit, with sure, deadly swiftness, the pinkish-yellow and black-banded coils of a twelve-foot serpent. From its eyes, with their strange oval pupils, a dark streak stretched to the angles of the mouth from which a long, forked tongue played like a black flame. As the fierce head crested the triple row of many-colored coils, Will saw the curious hole between eye and nostril, the hall-mark of a deadly clan, and knew that before him was the king of all the pit-vipers—the dreaded bushmaster.

He stared into the lidless, fatal eyes of the snake, as they shone evilly through the dusk until it seemed as if his heart would stop beating and icy drops stood on his forehead, for he knew from talks had with Professor Ditson that bushmasters possess a most uncertain temper, and he feared that this one might instantly attack him. Once he tried to move to a point farther along the circumference of the earthen circle. At the first stir of his cramped muscles, the great snake hissed again and quivered as if about to strike. Will settled despairingly back, resolved to move no more; yet ever his thoughts kept running forward to the long, dark hours which were to come, when he would be alone through the night with this terrible companion. Then if, overcome by sleep or cramp, he should move, he feared horribly to be stricken down in the dark by the coiled death that watched him.

Suddenly, as he set himself against making the least stir of a muscle, he heard from the jungle through the broken covering of the trap, the same far-reaching whisper of death which had sounded when he was hunting with Pinto. A moment later, with staring eyes, he saw a black stream move sibilantly down the opposite wall of the pit, and realized that the blind black ants of the jungle were upon him—and that there was no escape.

Slowly the head of the moving column approached the bottom of the pit, and Will remembered in sick horror how the ants had torn away shred after shred of living flesh from the tortured body of the agouti. As the insatiable, inexorable mass rolled toward him, the bushmaster seemed either to hear or scent its approach. Instantly its tense coils relaxed, and it hurried around and around three sides of the pit, lashing upward against the perpendicular walls in a vain attempt to escape. In its paroxysm of terror, it came so close to the motionless boy that its rough, sharp scales rippled against his legs. Only when the van of the ant-army actually reached the floor of the pit and began to encircle its whole circumference did the great serpent seem to remember Will's presence. Then, as if entreating the help of a human being, it forced itself back of him, and, as the ants came nearer, even wound its way around Will's waist in an attempt to escape.

For a moment the fearful head towered level with the boy's face. Instinctively, Will's hand flashed out and caught the bushmaster by the neck. It made no attempt to strike, nor even struggled under the boy's choking grip; only the coiled body vibrated as if trembling at the approach of the deadly horde. For a moment the advance of the ant-army seemed to stop, but it was only because, in accordance with its tactics, the head of the column began to spread out until the base of the pit was a solid mass of moving ants and the black tide lapped at Will's very feet. Half-turning, and placing his ankles instead of his heels against the sides of the wall, the boy gained a few inches on the rising pool of death that stretched out before him, while the straining body of the bushmaster vibrated like a tuning-fork.

By this time, the opposite wall of the pit was covered and the whole circle of the base of the cone-shaped pit black and moving, except the little arc where Will stood. The ants were so close that he could see the monster heads of the leaders, and the pit was full of the whisper of their moving bodies flowing forward. Will shut his eyes and every muscle of his tense body quivered as if already feeling their ripping, shearing mandibles in his flesh.

Just as the front line of the fatal legion touched his shoes, something struck him on the head, and he opened his eyes to see a liana dangling in front of him, while the light at the entrance of the pit was blurred by old Jud's head and shoulders. With his free hand, Will reached forward and seized the long vine, to find it ending in a bowline-knot whose noose never gives.

"Slip it under your arms," called down the old trapper, hoarsely, "an' hang on! We'll pull you up."

It was the work of only a second to carry out the old man's instructions. Thrusting the loop over his head and under his arms, the boy gripped the tough vine with his left hand and tightened his clutch around the unresisting body of the great bushmaster.

"I won't leave you behind for those black devils," he murmured, as if the snake understood, and tugged at the liana rope as a signal that he was ready to start. In an instant he was hauled aloft, just as the ants swarmed over the space where he had stood. Fending himself off from the slanting walls with his feet, Will went up with a rush and through the opening at the top almost as fast as he had entered it. Close to the rope stood old Jud, with face chalky-white as he watched the army of ants pouring down into the pit, while Hen, Joe, and Pinto, and even Professor Ditson, hauled with all their might on the vine.