Whilst they were standing consulting with each other, Murri whispered that he recognised one of the men as the fellow who had acted as spokesman for the tribe the night before.

"Then you may be sure that they are here for no good," said George to his brother.

"No; so get your revolver ready."

"But I haven't got it with me; I didn't put it on this morning."

"And neither have I mine! There it is, see, on the rocks below. I took it out of my belt when I was filling the bags, and forgot to pick it up when Murri shouted out."

"Then we are done for if they see us. We must trust to their not finding us."

But that hope was blighted even as he spoke, for in drawing back a little from the edge of the cliff George loosened a tiny pebble, which rolled over and fell on to the rocks beneath.

Alec's agonised "Hush, hush!" was all in vain. The tiny sound had struck the acute ears of the savages, and instantly betrayed the boys' hiding-place. One of the men had fitted a spear to his throwing stick, and before a second was passed a quivering dart whirred through the bushes just above their heads. The Wyobrees lost no time; without waiting a moment they began to climb up the cliff from the dry basin. They did not stop to choose the easiest place of ascent, but boldly began to scale up the very place over which the great waterfall used to pour.

The rock is very steep there, but they seem to find no difficulty in climbing it. In another moment they will have reached the edge of the cliff. They have left their spears down below, but their boomerangs are in their belts of kangaroo sinew, and they hold their waddies in their great strong jaws.

The boys are absolutely unarmed. Their fate seems sealed. They had risen to their feet when they saw that their hiding-place was detected, and now, white to the lips from the very anguish of excitement that they suffer, but quite calm, they look in each other's eyes steadily and prepare to meet their death. The myalls have almost reached the top of the crag; the foremost man will be able to place his hands on the edge in another moment. Suddenly, with a voice like a trumpet, Alec yells out—