Ferrier had resolved not to begin his adventurous voyage until all the men were gathered under John at the head of the pool. The actual passage of the rapids would take but a minute or two, and the time necessary for reloading the first raft would be halved if the whole party were employed in the work. The second convoy having arrived, John left them safely under cover while he retraced his steps for a short distance to a spot where he could witness his friend's performance. He held his breath and felt his skin creep as the raft came into view, shooting down at a furious rate to what appeared certain destruction. Ferrier had removed the upper part of the framework, and stood with pole in hand, bending low, his whole attention fixed on his task. Now he prodded to the right, now to the left: at one moment the raft swerved, having evidently scraped a rock, and he almost lost his balance; but recovering himself instantly, he dexterously slipped his pole over in the direction to which the raft had been driven, and came again into mid-current. John feared lest he should be carried far into the pool, beyond the spot where the loads were laid; but when the raft came into smooth water, and its momentum was checked, Ferrier flung a rope to the shore, and the craft, uninjured except for some chips at the edges, was hauled in.
"Splendid!" said John. "It would be a stunning sport if----"
But before he could complete the sentence Ferrier was running hard up-stream. There was a shout from the fort; the raft had been discovered; the second raft was still to be brought down. John instantly set the men to load up the first raft. Every movement was visible to the men in the fort. There were loud shouts; a few shots were fired; but the range was too long for inefficient marksmen. To John's consternation and alarm there came an echo to these shouts from up-stream. The warriors from the village were evidently within striking distance. Had they discovered Ferrier? Urging the men to hasten with the work of loading, he ran along the bank to see whether the second raft was on the way. Yes; it was sweeping down like the first, and on the opposite bank a crowd of yelling negroes rushed along, dodging the trees, and trying to keep pace. Ferrier paid no attention to them, his whole energy absorbed in his task. John sent a warning shot among the enemy, and they darted out of sight. The raft leapt and dashed and jolted down, and in little more than a minute after it passed John it lay moored beside the other at the shore of the pool.
The men having not yet finished the loading of the first raft, Ferrier had leisure to observe what the enemy were about. The warriors from the village, who had marched along the left bank of the river, were rushing round the northern shore of the pool towards the causeway. It was impossible to see what they would do when they reached it, and, to judge by the uproar in the fort, there was more excitement than cool calculation among Juma's party. But by the time the rafts were loaded, the breastworks replaced, and the ropes attached, the enemy's intention became clear. Before the rafts were loosed from their moorings and poled into the gentle current of the pool, a large number of negroes, with one or two Swahilis, emerged into view from behind the intervening island, and were seen hastening along the path which led from the causeway up the bluff.
"They've got a good start of us," Ferrier called from the leading raft. "We must run the gauntlet."
But now that the critical moment had arrived, John was setting his wits to work. In all the encounters with the enemy hitherto, success had been gained by the exercise of superior intelligence rather than superior force. Was there not a chance of outwitting them even now at the eleventh hour? Could they not be withdrawn from their threatening position above the gorge? An idea suggested itself: to let the rafts drift on until they came opposite the fort, and then to change their direction and pole them across the pool as if with the intention of landing on the western shore of the island and storming the fort. If the ruse succeeded, the enemy would rush back and swarm within the walls again.
John imparted his scheme to Ferrier in a few hurried sentences.
"It's worth trying," said Ferrier, "but can we get back into the current in time?"
"Yes; it begins to flow swifter, as you know, opposite the island. If only the men are drawn back into the fort, we shall have time to come back into the current and make straight for the rapids, and then they may run their hardest but won't overtake us."
"Well, you pole back first, so as not to change our order. They surely won't be such idiots!"