"You're a wonder!" gasped Tom. "It seems to me that you are a born soldier."

"Not a bit of it," was the modest reply. "But, you see, my father was always telling me about the fights in which he had taken part. They were usually against natives, in some part of this continent, and there was always a ruse of this sort, some dodge by which he and his men held the larger numbers of the enemy at bay. That's how it is that I have an eye which seems to take in the possibilities of a place, and I put it down to my father and his yarns that I was able to make defence practicable away back at the ravine. But, seriously, what do you think of the dodge?"

"It is the best thing you have yet thought out, Jim, and should prove of enormous advantage to us; for, knowing that we have a haven to retreat to, we shall go about our work of tracking the Mullah far more fearlessly, though I tell you that, in any case, it is going to be a risky game."

Pacing backwards and forwards amongst the trees, Jim and his companion soon marked out the site of their fort. Then they called for an axe, and cut a wide slit at the base of each trunk which they had decided was to be removed, giving orders that the men were to set to at the work on the following morning. That done, they went well beyond the trees, but finding nothing but a weary sandy waste, and no cover that could be of the slightest use to an enemy, they returned to the zareba, and selected a site close beside the well, and almost in the centre of the square which they had marked off for the fort. On this a rough circle was drawn, and calling Ali to his side, Jim gave directions that the trees, when felled on the morrow, were to be dragged there, and arranged to as to form a blockhouse.

"We want a raised platform," he said, as he walked over the spot once more, and deepened the line in the earth by means of his toe. "If we set our fellows to throw up a mound round the edge of this circle, and then pile the logs there, morticing them roughly together, we shall have a fine blockhouse, from which we shall be able to command the surrounding desert for many yards. I reckon that our rifles carry a good mile, and very likely even more than that; so that in the daytime we can make it impossible for the enemy to approach, unless in overwhelming numbers. If they come in a huge army, we shall lie behind our cover and blaze at them from a position of safety, and as we have been careful to bring a large store of ammunition, we need have no fears that it will become suddenly expended. I should think, too, that a watch-tower of some sort would be useful."

"Then why not make one of these trees serve the purpose?" asked Tom, staring aloft at the green top of a palm which overhung the party. "It happens to occupy the very centre of your circle, and can easily be pegged so as to make ascent possible."

"A grand idea!" exclaimed Jim, "and that, too, shall be carried out. But now about the camels and ponies. We want a zareba into which we can drive them at night, and in case of attack."

"Then do the same for them as for ourselves," said Tom. "Look here, old boy, you ought to take particular pains to keep them well away from the water, or our supply may be fouled and rendered unfit for our consumption. Why not dig out a place for them, throwing the earth removed into a wall, which will protect them? Then, if you place the zareba over there, a trench from the wells will carry the water to them, so that their wants can be supplied."

Tom pointed to a spot within thirty yards, where the ground fell slightly, and where numerous big palms grew, offering shade for the animals.

"It would be an easy matter to do as suggested," interposed Ali Kumar, interrupting his masters. "I have seen such an arrangement before, and will see that the trench is dug, and a small wooden gate put at the head, so that a certain quantity can be allowed to run through at any time. Otherwise you would have the zareba filled with water, and the animals would quickly die. As to our being able to do all this, I can promise that the end of the week shall see the work completed, for the men will have little to do now that we are in camp, and when the beasts are driven out to graze, and sentries posted, the others will have their hours free, and will devote them to getting the camp into a state of defence."