One moment he was near; the next he had grown as it were misty in the darkness, and disappeared, leaving Bart, fretting at the inaction, and thinking that the task of doing duty in watching as sentry was the hardest he had been called upon to perform.

Meanwhile the rough cattle driver and plainsman had continued his trot till the broken nature of the ground compelled him to proceed cautiously, threading his way in and out amongst the masses of rock, and forcing him to make a considerable détour before he passed the ridge of stones.

His first act was to drop down on hands and knees; his next to lie flat, and drag himself slowly forward a couple of hundred yards, and then stop.

It was quite time that he had, for on either hand, as well as in front, lay groups of Indians, while just beyond he could distinguish the horses calmly cropping the grass and other herbage near. So still was it, and so closely had he approached, that every mouthful seized by the horses sounded quite plainly upon his ear, while more than once came the mutterings of some heavy sleeper, with an occasional hasty movement on the part of some one who was restless.

Joses had found out all he wanted, and the next thing was to get back and give the alarm. But as is often the case in such matters, it was easier to come than to return. It had to be done though, for the position of those in the little camp was one full of peril, and turning softly, he had begun his retrograde movement, when a figure he had not seen suddenly uttered an impatient “ugh!” and started to his feet.

Joses’ hand went to his belt and grasped his knife, but that was all. It was not the time for taking to headlong flight, an act which would have brought the whole band whooping and yelling at his heels.

Fortunately for the spy in the Indian camp, the night was darker now, a thin veil of cloud having swept over the stars, otherwise the fate of Dr Lascelles’ expedition would have been sealed. As it was, the Indian kicked the form beside him heavily with his moccasined foot, and then walked slowly away in the direction of the horses.

Some men would have continued their retreat at once, perhaps hurriedly, but Joses was too old a campaigner for such an act. As he lay there, with his face buried deeply in the short herbage, he thought to himself that most probably the waking up of the Indian who had just gone, the kick, and the striding away, would have aroused some of the others, and in this belief he lay perfectly still for quite ten minutes.

Then feeling satisfied that he might continue his retreat, he was drawing himself together for a fresh start, when a man on his right leaped to his feet; another did the same, and after talking together for a few moments they too went off in the direction of the horses.

This decided Joses upon a fresh wait, which he kept up, till feeling that, safe or unsafe, he must make the venture, he once more started, crawling slowly along without making a sound, till he felt it safe to rise to his hands and knees, when he got over the ground far more swiftly, ending by springing to his feet, and listening intently for a few moments, when there was the faint neigh of a horse from the Indian camp.