Halliday, I should have said, had a small compass attached to his watch-chain. It was a trifling little thing, and of scarcely any use at sea; but, placed on the ground, it would enable us to take the bearings of an object with tolerable accuracy. He at once put it down, and we marked the direction the Arab had taken; it was almost due south-east.
“Shall we make sail, sir?” asked Ben, who was eager to be off.
“Yes,” I said. “You, Ben, lead, and keep straight ahead for the northern end of the most distant sand-hill in sight; while Mr Halliday and I will keep twelve paces apart, and twelve paces behind you. We shall thus form a triangle, and if we see you turning we will put you straight again. I think in that way we shall be able to keep a direct course.”
“I understand, sir,” said Ben.
Having measured our distances, we set off. We were already on the edge of the level desert, so that we had no impediments to interfere with our march. Had I been more sanguine of success, I should have gone on with better spirits; but with the slight hopes I entertained of overtaking Boxall, and suffering in common with my companions from excessive thirst, my spirits flagged, and I could with difficulty drag on my weary feet over the hot sand. But having reached the point for which we had been steering, we brought up; and again placing the compass on the ground, took a fresh departure. We had now no object by which to direct our course, and had it not been for the plan I had thought of, we should have had constantly to stop and ascertain by the compass whether we were steering right. The long shadows in front of us—or rather somewhat to the left—showed us that the sun was sinking low, and that unless we could reach the neighbourhood of the Arab camp before dark we should have to pass the night in the open desert. We pushed on bravely. Still, I confess I could hardly drag my feet after me; and I observed when I turned my eyes towards Halliday, that he was walking with yet greater difficulty, though unwilling to complain. Longer and longer grew our shadows—still the apparently illimitable desert stretched out before us—but nowhere was the camel to be seen. Influenced by Ben’s zeal, I had been induced to undertake the pursuit; but I now began to repent having yielded to it.
At length Halliday cried out, “Charlie, I can do no more!” and sank on the ground. So I called to Ben to stop, and we threw ourselves down by our companion’s side.