Suddenly a bushy bead, with a black face, horribly distorted by passion, appeared at the window furthest from where Professor Grimcke was standing.

The right hand was raised and in the act of poising a javelin to hurl at the white man; but the latter, with an incredibly quick movement, brought his Winchester to a level and fired.

The bronze skull was shattered as though it were a rotten apple, and the Murhapa, with a resounding shriek, went backward in the darkness.

A slight rustling at the other window drew the white man's attention thither, and, without lowering his weapon, he let fly at a group who were simply peering within, evidently believing there was no call to use their javelins.

Another screech told that the bullet had found its mark, and the other faces vanished.

Then Grimcke stepped out from the wall to gain a view of the opening which answered for a door. A rustling there told him a crowd were gathering, but they had taken warning just in time to avoid a third shot. Then he slipped a couple more cartridges from his belt into the magazine, so as to keep it full, and awaited the next step in this extraordinary business.

"I've about a hundred left," he reflected, "and that's enough to keep things on a jump, if I can dodge their javelins."

Meanwhile, Jared Long was not idle. He had but the opening at the rear to watch, and he did the duty well. Almost at the moment that his comrade fired his first shot, he descried the figure of a Murhapa trying to steal into the apartment without detection; but just enough of the moonlight that was shut from the front doors and windows, reached the rear of the building, to disclose the outlines of the head and shoulders, as he began stealthily creeping into the building.

Bippo had discovered the peril at the same moment, and clutched the arm of his master with a nervous intensity of terror. Long impatiently shook him off, and, with the same cool quickness of Professor Grimcke, drove a bullet through the head of the dusky miscreant, who was slain so suddenly that he rolled convulsively backward, without any outcry.

Almost at the same instant, a second native emitted a wild shout. He was directly behind the first and the latter lurched against him, causing such fright that he leaped back several feet with the involuntary cry fully understood by all whose ears it reached.

Long stood as rigid as a statue for several minutes, waiting for another chance, but none presented. Then he reflected that his position was much more favorable than Grimcke's, for not only had he but the single opening to guard, but his apartment was so shrouded in gloom that the sharpest-eyed warrior could not locate him from the outside.

The New Englander stepped to the door communicating with the front apartment and, barely showing himself, spoke:

"I can attend to the window on the right, Professor; leave that to me, while you watch the door and the other one."

"Thanks," returned his friend; "I think there is a little too much light in this part of the house."

Moving quickly to the hearth he heaped the ashes with his foot upon the blazing embers, until they were so smothered that only a few tiny twists of flame struggled through the covering. This left the place in such darkness that a sense of security instantly came to him.

"Good!" called the New Englander, who could no longer be discerned; "that makes matters more nearly equal!"

Although, as we have said, the moonlight was substantially shut off from the front of the heavy structure, yet the moon itself, being full, so illumined the surroundings that it was quite easy to distinguish the head and figure of any one of their enemies the instant he presented himself at one of the openings.

What both the defenders feared was, that the savages would make a sudden rush and force themselves within the cabin in spite of the disastrous reception they were sure to be given. Such an essay was certain to result in the overthrow of the whites, but the Murhapas must have realized the cost it would be to them. Brave as they were, they hesitated to incur the consequences until other means had failed.

Professor Ernest Grimcke now did a most daring thing. The fierce welcome he had given the attacking Murhapas resulted in their temporary demoralization. Knowing they would speedily recover, he decided to take advantage of the panic by an attempt to intensify it.

Striding to the door he paused on the very threshold and peered out upon the large space in his field of vision.

Fully a hundred savages were in sight. Apparently they had been crowding around the entrance when the shots from within caused a hasty scattering. They had halted a dozen yards or so away, where they were talking excitedly, still frightened and enraged, and with no thought of relinquishing the fight.

They had withdrawn so far from the front of the building that they were in the strong moonlight, and consequently in full view of the white man, who saw others of the natives hurrying from the right and left. Among them were women and children and the confusion and excitement were fearful.

Standing thus, Grimcke again raised his repeater and deliberately opened fire on the crowd. It seemed cruel, but it was an act of self-defence, for those people were clamoring for the lives of the two men within, and would not be satisfied until they were at their mercy.

It was a strange scene that followed. The interior of the building being dark, while the moonlight failed to touch the front, the figure of the white man was invisible to the dusky wretches howling on the outside.

All at once, from the black opening of the building, came the crash of the repeating Winchester. Spouts of fire shot out into the gloom in terrific succession, as if fiery serpents were darting their heads in different directions; for the marksman aimed, quickly to the right, to the left and to the front, never pausing until he had discharged half a score of shots.

The panic for a minute or two was indescribable. Men, women and children shrieked and scattered for the nearest available shelter. Behind the buildings and down the river bank they dashed, stumbled and rolled, until, but for the............