"What's the trouble now?" snorted Ned. "Got a cramp?"
"No; I've got a sore toe."
"Supposing we duck him," suggested Ned.
"We'll save all the water we have," warned the guide sharply. "No nonsense about it, either."
The party was in great good humor, now that they had found a water hole, and the animals had drunk until their sides were distended like balloons in process of being inflated.
"They've had enough," announced the guide, going to the animals and glancing over the herd sharply. "No more water for the present."
"Then perhaps we might as well be on our way," suggested the Professor.
Parry did not reply. He was shading his eyes with one hand, gazing intently off over the desert. The Professor, following the direction in which the guide was looking, discovered a cloud of dust rising into the air. The cloud was approaching them at a rapid rate.