The Mundurucu shook his head and said nothing more, but Hen continued his protests, even while paddling.

"Never knew any good luck to come when that ol' owl's around," he remarked mournfully. "It was him that sicked them vampires on to Will here, an' we're all in for a black time on this black ribber."

"Henry," remarked Professor Ditson, acridly, "kindly close your mouth tightly and breathe through your nose for the next two hours. Your conversation is inconsequential."

"Yassah, yassah," responded Hen, meekly, and the montaria sped along through inky shadows and the silver reaches of the new river in silence.

About midnight the forest became so dense that it was impossible to follow the channel safely, and the professor ordered the boat to be anchored for the night. Usually it was possible to make a landing and camp on shore, but to-night in the thick blackness of the shadowed bank, it was impossible to see anything. Accordingly, the party, swathed in mosquito-netting, slept as best they could in the montaria itself.

It was at the gray hour before dawn, when men sleep soundest, that Jud was awakened by hearing a heavy thud against the side of the boat close to his head. It was repeated, and in the half-light the old man sat up. Once again came the heavy thud, and then, seemingly suspended in the air above the side of the boat close to his head, hung a head of horror. Slowly it thrust itself higher and higher, until, towering over the side of the boat, showed the fixed gleaming eyes and the darting forked tongue of a monstrous serpent. Paralyzed for a moment by his horror for all snake-kind, the old man could not move, and held his breath until the blood drummed in his ears. Only when the hideous head curved downward toward Joe did Jud recover control of himself. His prisoned voice came out then with a yell like a steam-siren, and he fumbled under his left armpit for the automatic revolver which he wore in the wilderness, night and day, strapped there in a water-proof case.

"Sucuruju! Sucuruju! Sucuruju!" shouted Pinto, aroused by Jud's yell. "The Spirit of the River is upon us!" And he grasped his machete just as Jud loosened his revolver.

Quick as they were, the huge anaconda, whose family includes the largest water-snakes of the world, was even quicker. With a quick dart of its head, it fixed its long curved teeth in the shoulder of the sleeping boy, and in an instant, some twenty feet of glistening coils glided over the side of the boat. The scales of the monster shone like burnished steel, and it was of enormous girth in the middle, tapering off at either end. Jud dared not shoot at the creature's head for fear of wounding Joe, but sent bullets as fast as he could pull the trigger into the great girth, which tipped the heavy boat over until the water nearly touched the gunwale. Pinto slashed with all his might with his machete at the back of the great snake, but it was like attempting to cut through steel-studded leather. In spite of the attack, the coils of the great serpent moved toward the boy, who, without a sound, struggled to release his shoulder from the terrible grip of the curved teeth. The anaconda, the sucuruju of the natives, rarely ever attacks a man; but when it does, it is with difficulty driven away. This one, in spite of steel and bullets, persisted in its attempt to engulf the body of the struggling boy in its coils, solid masses of muscle powerful enough to break every bone in Joe's body.

It was Hen Pine who finally saved the boy's life. Awakened by the sound of the shots and the shouts of Jud and Pinto, he reached Joe just as one of the fatal coils was half around him. With his bare hands he caught hold of both of the fierce jaws and with one tremendous wrench of his vast arms literally tore them apart. Released from their death grip, Joe rolled to one side, out of danger. The great snake hissed fiercely, and its deadly, lidless eyes glared into those of the man. Slowly, with straining, knotted muscles, Hen wrenched the grim jaws farther and farther apart. Then bracing his vast forearms, he bowed his back in one tremendous effort that, in spite of the steel-wire muscles of the great serpent, bent its deadly jaws backward and tore them down the sides, ripping the tough, shimmering skin like so much paper. Slowly, with a wrench and a shudder, the great water-boa acknowledged defeat, and its vast body pierced, slashed, and torn, reluctantly slid over the side of the boat.

As Hen released his grip of the torn jaws, the form of the giant serpent showed mirrored for an instant against the moonlit water and then disappeared in the inky depths below. Joe's thick flannel shirt had saved his arm from any serious injury, but Professor Ditson washed out the gashes made by the sharp curved teeth with permanganate of potash, for the teeth of the boas and pythons, although not venomous, may bring on blood-poisoning, like the teeth of any wild animal. Jud was far more shaken by the adventure than Joe, who was as impassive as ever.