This moment of thought saved the drover from an act of madness which would certainly have ended in his death. Stobart trusted Yarloo implicitly, and also felt sure that Coiloo was doing his best to carry out the white man's wishes. Therefore he knew that it would be foolish to vent his rage at this particular time, and perhaps spoil what the two faithful natives were doing for him. So he picked up his weapons again, took his share of the horse-flesh, and went up to his cave.

He was very down-hearted. He was a man of action, and here he was, impelled to wait while others did things for him which he knew nothing about. He was very tired, but could not sleep because of his restless thoughts, so he went outside his cave after cooking and eating his dinner, and started to walk about in the cool evening air. He walked as silently as a native, and presently heard the sound of a voice chanting quietly and earnestly in the native tongue. He crept nearer. A man was crouching down on all four like an animal, swaying his body and muttering. Stobart was standing up and could not see who it was, so he stooped down till the man's body and head were silhouetted against the sky. It was Arrkroo, the Hater.

Inch by inch Stobart worked his way nearer, till he heard the words and saw what the native doctor was doing. There was a small pointed bone, called an irna, about eight inches long, sticking upright in the sand. At one end was a knob of hardened gum from spinifex grass, and a long string made of the hair of a lubra was attached to it. The man was stooping over the irna and muttering:

"Okinchincha quin appani ilchi ilchi-a." (May your head and throat be split open.)

He said this three times, moved the irna to a new place, and then began a new curse:

"Purtulinga apina-a intaapa inkirilia quin appani intarpakala-a." (May your backbone be split open and your ribs torn asunder.)

This went on for some time and then Arrkroo got up and walked away, leaving the irna in the ground. Next night he would return for it, and whoever the man pointed that bone at would most certainly die. Natives do not think that any man dies from a natural cause; it is always a case of magic, and if a big strong healthy black-fellow happens to be "boned" by his enemy in the proper way, he gets weaker and weaker, either with or without some special disease, till at last he dies. He always dies.

Arrkroo was afraid to kill Stobart openly, therefore he had prepared powerful magic and was going to "bone" him. Stobart guessed this, and took the chance of showing his power over the native doctor. He caught hold of the irna by the string, pulled it out of the sand, and walked back to the camp with it.

The men were all feasting round the fire. Arrkroo was amongst them, eating sparingly, as is the habit with the native doctors, and no doubt thinking what he was going to do to-morrow when he boned the hated white man. Everybody looked up when Stobart came into the firelight. One or two of the men saw the irna and called out, and at once the whole tribe was on its feet in alarm. Arrkroo saw it also and shook with fear. The white man was indeed a devil, for how else could he have found a little bone stuck in the sand on a dark night? In an instant the fire was deserted. The frightened natives crouched behind wurlies and breakwinds, dreading least the white man should point that deadly bone at them. But Stobart swung it by its hair string till it was over the hottest part of the fire and then let it drop. The string frizzled instantly, the knob of spinifex melted and flared up, and the bone was soon reduced to white powder.