Not another word was said. The question had been submitted to the arbitrament of chance and the New Englander had lost, and that, too without any suspicion on his part of the little trick played upon him.

Before resorting to the last opportunity, Long slipped through the back room and ascertained the outlook there. He was surprised at the result. Hardly a native was visible. It looked indeed as if they were working their way round to the front, and that some scheme of attack had been agreed upon by the leaders from that point.

The Professor's survey confirmed the theory of his friend. The Murhapas were more plentiful than ever. They appeared to be marshalling along the bank of the Xingu, where there were so many that it was impossible to count the heads and shoulders rising above the slope.

Waggaman was not in sight, though there could be no doubt that he was the inspiring spirit in the movement. All the indications were that a rush had been agreed upon. Should it be permitted to come off unopposed in its incipiency, it would be all up with the men who had defended themselves so bravely thus far.

"I will begin at the head of the row," said the Professor, "and you at the foot; make every shot tell."

"All right; begin!"

The fusillade was opened the same instant. Both men fired rapidly, and, though they could not pause to make their aim as sure as they wished, and though it is not to be supposed that every shot was effective, yet the execution was dreadful.

Arms were seen flung spasmodically upwards, figures leaped clear off the ground and then fell back out of sight, shrieks and shouts filled the air, and still the crack of the Winchesters continued without intermission.

One gratifying feature of the fearful scene was that the warriors began flocking around to the front, though they kept well back, as if to avoid the murderous discharge. These new arrivals not only afforded additional targets to the riflemen, despite their furious efforts to screen themselves, but proved that the scheme of the defenders was working as they desired: the natives were swarming from the rear to the front.

"Off with you; don't wait!" commanded the Professor.

"Good-bye!" was all that Jared Long said, as he darted from the side of his gallant friend and vanished.

Professor Grimcke took a few seconds to refill his magazine, when up went his Winchester again and the furious discharges seemed to be more rapid than before.

It would naturally be supposed that if the assailants saw that both of the white men had concentrated their fusillade at the front, they would make a dash to the rear. That, it may be said, would be the second step in the programme. It was calculated that the sudden volleys of the rifles would draw all the natives thither, and then, after learning what had taken place, a large part of them would rush back again.

The New Englander had been gone only a few minutes, when the Professor saw evidences that the second step was about to be taken. The savages were beginning to move back to the rear, though at a greater distance then from the building than before.

All at once Grimcke ceased firing. While looking sharply out of the door, he mechanically refilled the magazine of his rifle from his stock of cartridges which was running low.

"Now or never!" he said to himself, and then, turning, he ran swiftly through the two rooms to the rear door, through which he bounded without a moment's hesitation.

He expected his flight would be announced by a series of shouts and a storm of poisoned javelins. He held his breath, and, as the seconds passed, began wondering whether there was a possibility after all of successfully following the footsteps of his friend.

He was encouraged by the sounds of the deafening tumult from the front of the house. The Murhapas had swarmed into the front-room, proving that they had decided upon making the very rush of which the defenders stood in such dread.

This, although only a momentary diversion, was immeasurably in favor of the daring attempt of the flying fugitive.

Lest the reader may pronounce the escape of these two white men incredible, we hasten to explain that which, if left unexplained, would warrant such disbelief on the part of our friends.

The individual who gave the wild scheme an ending that otherwise it never could have had, was Ziffak, the head chieftain of the Murhapas. He proved to be the all-potent factor in the terrible problem.

From what has been related about these strange inhabitants of the Matto Grosso, it need not be said that they were too cunning, if left to themselves, to allow a door to stand open for their intended victims to escape, after penning them in such a trap.

Ziffak was the shrewdest member of the Murhapa tribe and much more fitted to be its ruler than King Haffgo. After bidding good-bye to the lovers, he hastened back to the middle of the village, where he arrived after the first disastrous repulse given his people by Professor Grimcke.

It took the fell............