Joe, himself in tears, gave the poor wretch the bottle, and Kennedy drained the last drop with savage haste.

“Thanks!” he murmured hoarsely, but Joe did not hear him, for both alike had dropped fainting on the sand.

What took place during that fearful night neither of them knew, but, on Tuesday morning, under those showers of heat which the sun poured down upon them, the unfortunate men felt their limbs gradually drying up, and when Joe attempted to rise he found it impossible.

He looked around him. In the car, the doctor, completely overwhelmed, sat with his arms folded on his breast, gazing with idiotic fixedness upon some imaginary point in space. Kennedy was frightful to behold. He was rolling his head from right to left like a wild beast in a cage.

All at once, his eyes rested on the butt of his rifle, which jutted above the rim of the car.

“Ah!” he screamed, raising himself with a superhuman effort.

Desperate, mad, he snatched at the weapon, and turned the barrel toward his mouth.

“Kennedy!” shouted Joe, throwing himself upon his friend.

“Let go! hands off!” moaned the Scot, in a hoarse, grating voice—and then the two struggled desperately for the rifle.

“Let go, or I’ll kill you!” repeated Kennedy. But Joe clung to him only the more fiercely, and they had been contending thus without the doctor seeing them for many seconds, when, suddenly the rifle went off. At the sound of its discharge, the doctor rose up erect, like a spectre, and glared around him.