Through the man's brain passed plan after plan whereby he might thwart the escape of the Englishman and his wife, for so long as the vital spark remained within the vindictive brain of Alexander Paulvitch none who had aroused the enmity of the Russian might be entirely safe.
Plan after plan he formed only to discard each either as impracticable, or unworthy the vengeance his wrongs demanded. So warped by faulty reasoning was the criminal mind of Rokoff's lieutenant that he could not grasp the real truth of that which lay between himself and the ape-man and see that always the fault had been, not with the English lord, but with himself and his confederate.
And at the rejection of each new scheme Paulvitch arrived always at the same conclusion—that he could accomplish naught while half the breadth of the Ugambi separated him from the object of his hatred.
But how was he to span the crocodile-infested waters? There was no canoe nearer than the Mosula village, and Paulvitch was none too sure that the Kincaid would still be at anchor in the river when he returned should he take the time to traverse the jungle to the distant village and return with a canoe. Yet there was no other way, and so, convinced that thus alone might he hope to reach his prey, Paulvitch, with a parting scowl at the two figures upon the Kincaid's deck, turned away from the river.
Hastening through the dense jungle, his mind centred upon his one fetich—revenge—the Russian forgot even his terror of the savage world through which he moved.
Baffled and beaten at every turn of Fortune's wheel, reacted upon time after time by his own malign plotting, the principal victim of his own criminality, Paulvitch was yet so blind as to imagine that his greatest happiness lay in a continuation of the plottings and schemings which had ever brought him and Rokoff to disaster, and the latter finally to a hideous death.
As the Russian stumbled on through the jungle toward the Mosula village there presently crystallized within his brain a plan which seemed more feasible than any that he had as yet considered.
He would come by night to the side of the Kincaid, and once aboard, would search out the members of the ship's original crew who had survived the terrors of this frightful expedition, and enlist them in an attempt to wrest the vessel from Tarzan and his beasts.
In the cabin were arms and ammunition, and hidden in a secret receptacle in the cabin table was one of those infernal machines, the construction of which had occupied much of Paulvitch's spare time when he had stood high in the confidence of the Nihilists of his native land.
That was before he had sold them out for immunity and gold to the police of Petrograd. Paulvitch winced as he recalled the denunciation of him that had fallen from the lips of one of his former comrades ere the poor devil expiated his political sins at the end of a hempen rope.
But the infernal machine was the thing to think of now. He could do much with that if he could but get his hands upon it. Within the little hardwood case hidden in the cabin table rested sufficient potential destructiveness to wipe out in the fraction of a second every enemy aboard the Kincaid.
Paulvitch licked his lips in anticipatory joy, and urged his tired legs to greater speed that he might not be too late to the ship's anchorage to carry out his designs.
All depended, of course, upon when the Kincaid departed. The Russian realized that nothing could be accomplished beneath the light of day. Darkness must shroud his approach to the ship's side, for should he be sighted by Tarzan or Lady Greystoke he would have no chance to board the vessel.
The gale that was blowing was, he believed, the cause of the delay in getting the Kincaid under way, and if it continued to blow until night then the chances were all in his favour, for he knew that there was little likelihood of the ape-man attempting to navigate the tortuous channel of the Ugambi while darkness lay upon the surface of the water, hiding the many bars and the numerous small islands which are scattered over the expanse of the river's mouth.
It was well after noon when Paulvitch came to the Mosula village upon the bank of the tributary of the Ugambi. Here he was received with suspicion and unfriendliness by the native chief, who, like all those who came in contact with Rokoff or Paulvitch, had suffered in some manner from the greed, the cruelty, or the lust of the two Muscovites.
When Paulvitch demanded the use of a canoe the chief grumbled a surly refusal and ordered the white man from the village. Surrounded by angry, muttering warriors who seemed to be but waiting some slight pretext to transfix him with their menacing spears the Russian could do naught else than withdraw.
A dozen fighting men led him to the edge of the clearing, leaving him with a warning never to show himself again in the vicinity of their village.
Stifling his anger, Paulvitch slunk into the jungle; but once beyond the sight of the warriors he paused and listened intently. He could hear the voices of his escort as the men returned to the village, and when he was sure that they were not following him he wormed his way through the bushes to the edge of the river, still determined some way to obtain a canoe.
Life itself depended upon his reaching the Kincaid and enlisting the survivors of the ship's crew in his service, for to be abandoned here amidst the dangers of the African jungle where he had won the enmity of the natives was, he well knew, practically equivalent to a sentence of death.
A desire for revenge acted as an almost equally powerful incentive to spur him into the face of danger to accomplish his design, so that it was a desperate man that lay hidden in the foliage beside the little river searching with eager eyes for some sign of a small canoe which might be easily handled by a single paddle.
Nor had the Russian long to wait before one of the awkward little skiffs which the Mosula fashion came in sight upon the bosom of the river. A youth was paddling lazily out into midstream from a point beside the village. When he reached the channel he allowed the sluggish current to carry him slowly along while he lolled indolently in the bottom of his crude canoe.
All ignorant of the unseen enemy upon the river's bank the lad floated slowly down the stream while Paulvitch followed along the jungle path a few yards behind him.
A mile below the village the black boy dipped his paddle into the water and forced his skiff toward the bank. Paulvitch, elated by the chance which had drawn the youth to the same side of the river as that along which he followed rather than to the opposite side where he would have been beyond the stalker's reach, hid in the brush close beside the point at which it was evident the skiff would touch the bank of the slow-moving stream, which seemed jealous of each fleeting instant which drew it nearer to the broad and muddy Ugambi where it must for ever lose its identity in the larger stream that would presently cast its waters into the great ocean.
Equally indolent were the motions of the Mosula youth as he drew his skiff beneath an overhanging limb of a great tree that leaned down to implant a farewell kiss upon the bosom of the departing water, caressing with green fronds the soft breast of its languorous love.
And, snake-like, amidst the concealing foliage lay the malevolent Russ. Cruel, shifty eyes gloated upon the outlines of the coveted canoe, and measured the stature of its owner, while the crafty brain weighed the chances of the white man should physical encounter with the black become necessary.
Only direct necessity could drive Alexander Paulvitch to personal conflict; but it was indeed dire necessity which goaded him on to action now.
There was time, just time enough, to reach the Kincaid by nightfall. Would the black fool never quit his skiff? Paulvitch squirmed and fidgeted. The lad yawned and stretched. With exasperating deliberateness he examined the arrows in his quiver, tested his bow, and looked to the edge upon the hunting-knife in his loin-cloth.
Again he stretched and yawned, glanced up at the river-bank, shrugged his shoulders, and lay down in the bottom of his canoe for a little nap before he plunged into the jungle after the prey he had come forth to hunt.
Paulvitch half rose, and with tensed muscles stood glaring down upon his unsuspecting victim. The boy's lids drooped and closed. Presently his breast rose and fell to the deep breaths of slumber. The time had come!
The Russian crept stealthily nearer. A branch rustled beneath his weight and the lad stirred in his sleep. Paulvitch drew his revolver and levelled it upon the black. For a moment he remained in rigid quiet, and then again the youth relapsed into undisturbed slumber.
The white man crept closer. He could not chance a shot until there was no risk of missing. Presently he leaned close above the Mosula. The cold steel of the revolver in his hand insinuated itself nearer and nearer to the breast of the unconscious lad. Now it stopped but a few inches above the strongly beating heart.
But the pressure of a finger lay between the harmless boy and eternity. The soft bloom of youth still lay upon the brown cheek, a smile half parted the beardless lips. Did any qualm of conscience point its disquieting finger of reproach at the murderer?
To all such was Alexander Paulvitch immune. A sneer curled his bearded lip as his forefinger closed upon the trigger of his revolver. There was a loud report. A little hole appeared above the heart of the sleeping boy, a little hole about which lay a blackened rim of powder-burned flesh.
The youthful body half rose to a sitting posture. The smiling lips tensed to the nervous shock of a momentary agony which the conscious mind never apprehended, and then the dead sank limply back into that deepest of slumbers from which there is no awakening.
The killer dropped quickly into the skiff beside the killed. Ruthless hands seized the dead boy heartlessly and raised him to the low gunwale. A little shove, a splash, some widening ripples broken by the sudden surge of a dark, hidden body from the slimy depths, and the coveted canoe was in the sole possession of the white man—more savage than the youth whose life he had taken.
Casting off the tie rope and seizing the paddle, Paulvitch bent feverishly to the task of driving the skiff downward toward the Ugambi at top speed.
Night had fallen when the prow of the bloodstained craft shot out into the current of the larger stream. Constantly the Russian strained his eyes into the increasing darkness ahead in vain endeavour to pierce the black shadows which lay between him and the anchorage of the Kincaid.
Was the ship still riding there upon the waters of the Ugambi, or had the ape-man at last persuaded himself of the safety of venturing forth into the abating storm? As Paulvitch forged ahead with the current he asked himself these questions, and many more beside, not the least disquieting of which were those which related to his future should it chance that the Kincaid had already steamed away, leaving him to the merciless horrors of the savage wilderness.
In the darkness it seemed to the paddler that he was fairly flying over the water, and he had become convinced that the ship had left her moorings and that he had already passed the spot at which she had lain earlier in the day, when there appeared before him beyond a projecting point which he had but just rounded the flickering light from a ship's lantern.
Alexander Paulvitch could scarce restrain an exclamation of triumph. The Kincaid had not departed! Life and vengeance were not to elude him after all.
