"Can do in a bark canoe," he said at last; "but in this thing—I don't know."

Pinto and Hen both feared the worst in regard to anything which had to do with Black River. It was Professor Ditson who finally made the decision.

"It would take us weeks," he said, "to cut a trail through the forests and portage this boat around. One must take some chances in life. There seems to be a channel through the very center of the horseshoe. Let's go!"

For the first time during the whole trip old Jud looked at his rival admiringly.

"The old bird has some pep left, after all," he whispered to Will. "I want to tell you, boy," he went on, "that I've never seen worse rapids, an' if we bring this canal-boat through, it'll be more good luck than good management."

Under Professor Ditson's instructions, Pinto took the bow paddle, while Hen paddled stern, with Will and Joe on one side and Jud and the professor on the other. Then all the belongings of the party were shifted so as to ballast the unwieldy craft as well as possible, and in another moment they shot out into the swift current. Faster and faster the trees and banks flashed by, like the screen of a motion picture. Not even a fleck of foam broke the glassy surface of the swirling current. With smooth, increasing speed, the river raced toward the rapids which roared and foamed ahead, while swaying wreaths of white mist, shot through with rainbow colors, floated above the welter of raging waters and the roar of the river rose to shout. Beyond, a black horseshoe of rock stretched from one bank to the other in a half-circle, and in front of it sharp ridges and snags showed like black fangs slavered with the foam of the river's madness.

In another second the boat shot into the very grip of these jaws of death. Standing with his lithe, copper-colored body etched against the foam of the rapids, the Mundurucu held the lives of every one of the party in his slim, powerful hands. Accustomed from boyhood to the handling of the river-boats of his tribe through the most dangerous of waters, he stood that day like the leader of an orchestra, directing every movement of those behind him, with his paddle for a baton. Only a crew of the most skilled paddlers had a chance in that wild water; and such a crew was obedient to the Indian. In the stern, the vast strength of the giant negro swung the montaria into the course which the bow paddler indicated by his motions, while the other four, watching his every movement, were quick to paddle or to back on their respective sides. At times, as an unexpected rock jutted up before him in the foam, the Indian would plunge his paddle slantwise against the current and would hold the boat there for a second, until the paddlers could swing it, as on a fulcrum, out of danger. Once the craft was swept with tremendous force directly at an immense boulder, against which the water surged and broke.

To Jud and the boys it seemed as if Pinto had suddenly lost his control of the montaria, for, instead of trying to swing out of the grip of the currents that rushed upon the rock, he steered directly at its face. The Mundurucu, however, knew his business. Even as Jud tensed his muscles for the crash, the rebound and undertow of the waters, hurled back from the face of the rock, caught the boat and whirled it safely to one side of the boulder. In and out among the reefs and fangs of rock the Mundurucu threaded the boat so deftly, and so well did his crew behind him respond, that in all that tumult of dashing waves the heavy craft shipped no water outside of the flying spray.

In another minute they were clear of the outlying reefs and ledges and speeding toward the single opening in the black jaw of rock that lay ahead of them. Here it was that, through no fault of their steersman, the great mishap of the day overtook them. Just beyond the gap in the rock was a little fall, not five feet high, hidden by the spray. As Pinto passed through the narrow opening he swung the bow of the boat diagonally so as to catch the smoother current toward the right-hand bank of the river, which at this point jutted far out into the rapids. As he swerved, the long montaria shot through the air over the fall. The Indian tried to straighten his course, but it was too late. In an instant the boat had struck at an angle the rushing water beyond, with a force that nearly drove it below the surface. Before it could right itself, the rush of the current from behind struck it broadside, and in another second the montaria, half-filled with the water which it had shipped, capsized, and its crew were struggling in the current.

It was Hen Pine who reached the river first. When he saw that the boat was certain to upset he realized that his only chance for life was to reach smooth water. Even while the montaria was still in mid-air he sprang far out toward the bank, where a stretch of unbroken current set in toward a tiny cape, beyond which it doubled back into a chaos of tossing, foaming water where not even the strongest swimmer would have a chance for life. Hen swam with every atom of his tremendous strength, in order to reach that point before he was swept into the rapids beyond. His bare black arms and vast shoulders, knotted and ridged with muscle, thrashed through the water with the thrust of a propeller-blade as he swam the river-crawl which he had learned from Indian swimmers. For an instant it seemed as if he would lose, for when nearly abreast of the little cape several feet of racing current still lay between him and safety. Sinking his head far under the water, he put every ounce of strength into three strokes, the last of which shot him just near enough to the bank to grip a tough liana which dangled like a rope from an overhanging tree-top. Pinto, who was next, although no mean swimmer, would never have made the full distance, yet managed to grasp one of Hen's brawny legs, which stretched far out into the current.