DOWN the steep slope Joe went, powerless to catch himself. There were no shrubs or stalks to grip, no hard soil to cling to.

His mind was in a whirl. Where would he land? How far had he yet to go? He comforted himself in the thought that there were no rocks or tree trunks to dash against, but if the soil at the bottom of the hill happened to be hard, his doom might be sealed. Already he could feel the jar and pain of suddenly coming to an abrupt stop on unyielding ground.

Down, down he went, past the pack camels that were still slowly climbing the steep side of the mound, lucky enough to have been missed by the falling camel.

Joe caught a momentary glimpse of his own dromedary, which was also rolling rapidly down.

Suddenly he felt a severe jar and gradually came to a stop in the soft sand at the foot of the dune.

A moment later he glanced up fearfully, as he saw his dromedary coming down at him with lightning rapidity.

He tried to rise and dash to one side, but his feet failed to respond to his efforts. They had been numbed by the jar of striking the ground.

The falling camel was almost upon him now. Something must be done at once!

Summoning all his strength, he threw his body to the right of the oncoming animal. It was an act of desperation, and he felt sure that it would fail. But a moment later there was a rush, the sound of swishing sand, and the animal whisked past, stirring up a dense cloud of fine soil.

Joe gave a sigh of relief and for a brief period sank back down on the sand, as though waiting for his strength to be restored. Then he was up, looking for the fallen camel.