‘How is it that you are still here?’ I demanded.

‘The horse is all right again,’ was the surly answer.

‘So much the worse for you.’ I took out my revolver in one hand, and my watch in the other. ‘In ten minutes from now I aim this revolver at you, and fire,’ I remarked. ‘It kills at two hundred metres. I should advise you to get out of range.’

I do not think I have ever seen a man get through his preparations in less time than then. Long before the allotted time was up, he was well out of reach, galloping down the slope of the hill.

In every expedition through a wild country there comes a moment which decides who is to be master. That moment past, I had no fear of further trouble. I was now able to unbend with the guide; I informed him that I expected to find gold, and promised him a rich reward if I succeeded with his aid.

But a disappointment was in store for me. Although we marched carefully along the summit of the hills, and I scrutinised every yard of the valley below with a powerful field-glass, I detected no trace of anything calling for investigation; in fact, I discerned no signs of human life. By the time I had worked down to the railway I began to fear that I was on a false scent.

It was in the night, after we had pitched our camp close beside the line, that the true solution occurred to me. I rose and secretly crept out of my tent, eluding the solitary watchman, and made my way along the track of the rails. After groping and stumbling over the roughly laid road for three or four miles, I suddenly made a discovery. The line divided, sending off a branch rail, which curved away to the south.

I knew now what had become of the missing gang of prisoners, or rather—for by this time I saw more clearly—of military recruits.

I also knew why I had missed my way. The guide had led me to the north of the line, and what I had come so far to find lay to the south.

The next day I issued orders to continue the march to the southward, crossing the railway. The face of the guide, when he received this direction, sufficiently showed that I was getting warm, as the children say, at last. He made no open remonstrance, but in the course of the day I noticed that another man and horse had disappeared.