"Can we trust the fellow?" asked Jim doubtfully, turning to Tom. "Perhaps it is a trap, into which they hope we shall walk blindly."

"I hardly think so, old chap. You have given these beggars such a licking that they are in terror of their lives, and I believe they are telling you the truth. I should instruct him to say to the sheik that you will harm him no further at present, but that if you find he has been playing with you, you will punish him on your return."

"That is good advice, Tom, and I'll leave it to you to speak to him. Then let us talk over the preparations to be made before entering upon this desert march."

Accordingly, Tom repeated his words to the tribesman, warning him in stern tones that the slightest treachery would be severely punished.

"Now return to your sheik," he continued, "and be careful that in future you remain peaceful, for the British troops will be this way before very long, and will treat you far more severely than we have done, unless you can prove that you are friendly."

With many salaams and repeated thanks, the man withdrew; and then Tom and Jim called Ali Kumar to join them in consultation.

"The question of water seems to me to be the most important," said Jim, opening the conversation. "How are we to contrive to carry sufficient to last for one hundred and fifty miles?"

"We'll ask Ali," replied Tom. "You see, I've never been in this part before, and, though I have done a deal of spying in Aden, I've never joined in one of these expeditions. This is, in fact, all strange to me."

"I have crossed the Hoad on several occasions, master," interposed Ali, "and can give you my help. Once beyond the desert, I can do nothing, for I shall then be in strange country. Indeed, no caravan has ever penetrated so far, for the land beyond belongs to the Mullah. As to water, you have tanks with you, which should prove sufficient. But a guard must be set upon their contents, and the allowance for man and beast strictly dealt out. Again, five days is said to be the shortest time in which the march can be accomplished, but I think that we shall do well to press on more hastily. The camels are all in the best of condition, and can well stand the fatigue. Then again, the following and baggage are comparatively small, so that our movements should be correspondingly rapid. When we reach the other side, we can rest for a time, while we send out scouts to gather news."

"Excellent!" exclaimed Jim. "And now, when should we start?"