"And while they are at work we shall make excursions into the Mullah's country," remarked Jim. "We'll just wait until the wire is stretched and the blockhouse begun, for it would not do to have the enemy coming down upon us before we were ready. Then we'll take the best camels and set out. Who knows but that we may have the luck to rescue my father without much trouble, and in a week we may even be marching for the coast once more?"

He spoke in the most hopeful manner, for the good fortune with which they had hitherto met had raised his spirits to the highest, so much so that complete success seemed even now in sight. But Jim had not yet encountered the terrible Mullah, he whose name was a byword in Northern Africa, and whose cruelties and whose cunning were talked about in every part of the civilized world. Had he had personal experience of him, his ideas would have undergone a change, for this leader of the Somali fanatics was not likely to sit down tamely and submit to the theft of a slave. Why should he indeed, when he openly boasted that he was ready to meet all the troops which the British Government could bring against him? It was out of the question to imagine for a moment that he who had so recently defeated a British column would dream of allowing this small expedition to escape his clutches, if he obtained news of its coming. Why, the guns and ammunition Jim and his following possessed would alone have been a prize, while the death of all who took part in this audacious enterprise would elevate the Mullah still higher in the estimation of the savage tribesmen who lived in these parts. Yes, had Jim been able to see into this matter as clearly as he was able to observe the strongest position for defence, he might have been less sanguine, indeed he might have trembled at the thought of all the danger before him. But he was blissfully ignorant, and went on with his plans of rescue, without allowing his mind to dwell unduly upon the prospect of difficulties which might yet have to be encountered. Would his determination have been altered had he known that at that very moment the Mullah was listening to the tale of a scout who had witnessed the march of the column on the previous day? We doubt it, for Jim was not the lad to give in till convinced that he was beaten. But, as it was, he knew nothing, and went on with his preparations with a mind which was free from uneasiness.

"We have all had a hard day," he said, "so I propose we turn in early to-night. Then we can be up with the lark, and set to at the work we have before us."

Scarcely had day dawned when all were awake, and guards having been posted to watch the grazing beasts, the remainder took spades and axes, which had been included in the baggage of the column, and, stripping to the waist, began to cut down the trees which Jim and Tom had marked on the previous day. Then, while some dragged the logs to the centre, others unrolled the barbed wire, and began to form an entanglement. A tiny doorway was left, so that the garrison could enter at will, but it was protected inside by a semicircle of the wire, so that should one of the enemy happen to rush in, he would still have an impenetrable barrier before him.

When the entanglement was completed to his satisfaction, Jim set the men to work to throw up the platform for the blockhouse, and, before darkness fell, saw it completed.

"And now for a zareba for the animals," he cried gaily, on the following morning. "Not till that is done can I leave the camp."

With Tom beside him to aid him with his advice, he directed the men how to proceed with the work, and, by way of encouraging them, seized a spade himself, and began to delve with all his might. For hours together all laboured, but, thanks to the fact that the soil was light and easily turned, the task proved easier than it might have been. Indeed, by nightfall the animals were safely enclosed, and an entanglement of wire surrounded them, so that even if the enemy managed to rush up to them, they could not cause them to stampede. A trench had been cut from the wells to this zareba, within which a long trough had been constructed of mud, so arranged that it could be filled to the brim at the will of those who lived in the blockhouse, while the contents would drain slowly away and soak into the soil outside. Standing in the centre of the miniature fort which he had caused to be erected, Jim looked about him on that evening with feelings of pride and satisfaction.

"I never could have thought it possible," he murmured to himself. "When we started from the farther side of the Hoad, it often troubled me to think what we should do to protect ourselves once we reached the Mullah's country, but I never dreamt that we should have the luck to fall in with this oasis. Why, we could live here for a month, or longer, and stand a siege without much fear; for, with these logs to protect us, we ought to be able to keep the plain outside clear of the enemy during the daytime, while our animals could graze in the large square of barbed wire which we have made. Then, as soon as they had eaten the grass there, we could send our fellows out to cut more during the night. Yes, we are in clover here, and can now take measures to rescue father. Tom, I want to ask you a question," he continued to his friend.

"Well, what is it, old boy?"

"How about leaving the camp? Will it be sufficient if Ali remains in charge?"