"It is more than kind of you both," he began, after a short pause, during which he looked sharply about him. "As you have left this matter to me, I will settle it, if possible, but I ask you to correct me should you consider my decision unwise or unreasonable. When I consider that the surrounding country is overrun by enemies, and that to venture from this curious place would mean capture, I say at once that we should be fools even to dream of quitting such a spot. Why, look at it! That low and narrow arch is just the position which four desperate men should be able to defend so long as food and drink lasted, and it is my advice that we at once make plans to keep watch at the entrance, in case of discovery. Our future actions absolutely depend upon the existence of sufficient supplies."

"Then you may call it certain that we have flesh and water to last us for a month," interposed Ali Kumar. "Look there, master! There we have a store of food, while yonder, in the corner of this great chamber, is a pool of clear spring water, into which a stream drains from the hillside continually, while the overflow disappears through a crevice in the floor."

Turning suddenly upon his heel, the native shikari pointed to the two sleeping camels, and then away to one side of the entrance-hall. Looking in that direction, and by the aid of the torches, Jim and his comrades at once caught the reflection from the surface of a large pool of water, while a moment later, as they stood there listening, the gentle splash of a falling stream came to their ears.

"Good!" said Jim, in tones of pleasure. "I reckon that, if we were to slay one of the beasts, we could cut the flesh into strips, as the Boers and Red Indians do, and cure it by placing it outside in the sun, or by drying it over a smoky fire. Yes, in my opinion, that absolutely settles the question. Our game is to stick to this place through thick and thin, and resist all attacks; and meanwhile two of our number can easily be spared to explore some of these workings which I see lead from this hall. Indeed, the more I think of it, the more certain am I that Ali's find will prove to be the very thing for us; for, supposing the Mullah and his men rush the entrance, we can still retire into one of the tunnels, and make things hot for them."

"I fully agree with you, my boy," said Colonel Hubbard heartily. "So long as powder and shot last, we four men—for I count you equal to ourselves in strength and pluck—should be able to keep the enemy out. Then, if things get too hot for us, we shall retire, with food, and water too, if we can carry it, into the old workings and defy the Mullah's army. Indeed I doubt whether one of them would have the courage to pursue us underground, for these natives are superstitious fellows, and fear all kinds of imaginary things. Had it not been for that, they or their ancestors would have quickly investigated these mines, and would have turned them to account. But for generations they have been little better than savages, and have been pleased with an existence which has been spent partly in agricultural pursuits, and partly in raids upon their neighbours. And now, how are we to defend the position?"

"I've an idea," cried John Margetson, suddenly snatching the torch from the colonel's hand and advancing to the entrance. "But, first of all, I should like to know from Ali the condition of affairs outside, for I confess that, though I have been for three years a slave to the Mullah, I have never been in this ravine. Indeed, amongst the Somalis, it is scarcely known, and I doubt whether a single one of them has ventured into it; for it is considered to be haunted, and that is quite sufficient to keep all inquisitive people away. But answer my question, Ali, like a good fellow."

"The valley is a narrow one, and, indeed, when looked into from the hills above, is more like a deep pit with steeply sloping sides. A well stands at the opening, which is but a few yards in breadth. But, farther in, the walls give back quickly, and then slowly approach again, till a sharp angle is formed, in which this mine is situated. In the old days, of which my master's father has spoken, a paved road led down the centre of the ravine, and ascended easily to this entrance, and by that, no doubt, the slaves were wont to come to their work. But the store of water in this chamber has cut its way through the floor, and, issuing upon this stone, has, in course of time, cut a deep and wide furrow across it to its bed beyond, from which it flows to the well beside the village path. For that reason, my masters, I led you by a track which ascended the slope of the hill."

"Then my plan should be of service to us," said John Margetson, who had closely followed Ali's explanation. "It seems to me that when the morning comes, and we have daylight to help us, we shall have an uninterrupted view of the whole ravine from this low-arched entrance of the mine, and shall be able to cover every foot of it with our rifles. But we must remember that these Somalis possess many firearms, and if they happen to discover us, and can get rid of their fears of the supernatural, they will lie upon the slopes about us and pour in their fire with certain aim, for the range will be a close one. Only then should we learn that to lie at the entrance would be impossible, for it would cost us our lives. Do you follow me, my friends?"

"Quite easily!" exclaimed the colonel. "Had you had the training of a soldier, you could not have seen the danger more clearly. I am waiting impatiently to hear how you propose to get over the difficulty, which, there is no doubt, is a very real one."

"Then listen, colonel. My idea is a very simple one, and had I not thought of it, you or your son would quickly have done so. Since life to us would be impossible, even though we were to lie flat upon the floor, my suggestion is that we set to work with what implements we have and dig a trench of sufficient depth just within the opening to allow us to obtain shelter. The earth which we remove can be thrown up in front, so that the hole need not be more than three feet in depth."