It was somewhat of a relief to note that directly ahead of them was a small stream, one of the tributaries of the West, and before reaching the open area near the river, the Professor directed the wagon toward a clump of brush, behind which the yaks were tethered.

They were thus in a position where they had an ample water supply, and the Professor remarked, that in campaigning two things were essential, one was food and the other water, and of the two water was of most value for a short period, at least. The yaks needed it, and as that was their means of transportation, every consideration must be given them.

"As we are now campaigning in earnest, we must have some system, and a thorough understanding of what is to be done," said the Professor. "A thorough watch must be kept at all times day and night. We must not separate, but keep closely together, and in watching just as much care must be taken of our rear and our flanks. We do not know from which direction these people are likely to spring up. Remember, from our experiences night before last, this is territory over which they travel."

It should be stated that in the night referred to a band of the savages had passed their camp, going in the direction in which the wagon had taken, and they were of the impression that those discovered to the south of the stream were the ones who had come so near finding them.

"There is also another matter that should be considered. While we do not anticipate any disaster to our party, still we should at all times make provision for any separation, should such a thing take place. I estimate that we are now directly south of the mouth of West River, and that the sea to the north is from fifteen to twenty miles away. Now, let it be understood that in case we are defeated, or by any chance there should be any separation, the place of retreat will be toward the location of the wrecked boat, which is near the mouth of the river."

The great difficulty was to impart this to John. He was interested, in a peculiar sort of way, in the proceedings, and the Professor undertook to make the situation, as just explained, clear to him. For this purpose he made a chart to show the tributary stream on which they were encamped, flowing into the West River, and its course to the sea, and by pointing out the spot to the west of the river mouth, where the wrecked boat was landed, he hoped the course could be fully understood. This explanation seemed to be comprehended by him, but of this there could be no assurance.

Meanwhile they had not for a moment forgotten to keep in sight the warring factions, for now that they were much closer the character of the meeting could not be misunderstood.

"Look at them," cried George; "the other tribe seems to be victorious. They are coming this way." Such seemed to be the case. The retreating forces were coming directly toward the wagon, and the situation now began to take on a very grave aspect.

"What shall we do, Professor, if they come on to us?"

"We are here on a peaceful mission, and should fight only in self-defense," was his reply. This did not exactly suit the spirit of the boys, but they deferred to the wisdom of their friend.