"Slip away, west or east?" suggested Ferrier.
"Hopeless! Loaded as we should be, we couldn't escape them. It's too late to get on to the river now. This one raft won't hold us all. We are done at last!"
They looked at each other in speechless anxiety. The men had ceased work on the second raft; they all knew what had occurred, and gazed at their white leaders with troubled countenances.
"There's one desperate chance," said Ferrier at length. "Juma is nearest. Deal with him before the others come up."
John stared at him for a moment with brightening eyes. Then he sprang up.
"Right!" he cried. "It's the one chance. But we can't risk it without knowing a little of the ground. I'll go out with Bill and have a look at it, if you'll stay and keep a look-out for the down-stream lot."
The two set off at once. Bill led the way rapidly round the village and further up the hill until they reached the summit. From this point the ground fell away to the plain, and rather less than a mile away John descried the knoll of which Bill had spoken, the peninsula from which it rose jutting out into the river. It was densely covered with vegetation, and on the other side of the stream there was a similar screen. Only a short reach of the river was visible, but here he saw negroes wading waist-deep. They were crossing, however, not to the far side, but from it. Juma had thought it better to bring his porters to the ivory than the reverse. Apparently none of it had yet been transported from bank to bank; but it was all laid in readiness.
Bill gazed at the scene with an expression of mingled grief and rage. Suddenly he stretched forth his hand, pointing towards the trees on the near side of the river. At first John could not see anything but the dense mass of foliage; but presently he discerned two negroes standing motionless at the foot of the knoll. Clearly Juma had posted them as scouts to give warning of any movement from the village. So many years had passed since the defeat of his safari that the likelihood of the people suspecting his search for the treasure was small, especially since they were obviously unaware of its location. But with the remembrance of their hostility in his mind he was evidently uneasy.
John's guess at the course of events was very near the mark. Ever since the defeat of the Arabs, Juma, the sole survivor of their hapless safari, had lived for nothing else than the recovery of the ivory, which would make him a millionaire according to the native standard of wealth. But the store lay in the enemy's country; he had the best of reasons for knowing how formidable they were, and what his fate would be if he was discovered by them when removing the ivory. He had recognized that there was little chance of obtaining possession of it unless he came with sufficient force to repel attack. Its transport would demand a large number of porters, and a still larger number of armed men to protect them. It had therefore been the work of his life to organize such a party. For this he had become a porter himself, to avail himself of opportunities of stealthy pilfering. For this he had established himself in the island fort, hoping to seize an occasion when the villagers were absent on a raid or a hunting expedition to make a dash up the river and achieve the aim of his ambition.
The unexpected series of events that culminated in the capture of the fort had interposed a check at the very moment when he saw success within his grasp. But his cunning mind conceived the scheme which he had carried out: to form an alliance with the very tribe with whom he had expected to come into conflict. He seized upon the presence of the white men as a rational basis for their alliance, intending, when the white men and their safari had been annihilated, to turn his arms against his allies, and having overthrown them, to secure the prize he had so long coveted.