of the moon, so barren was it. No sound but that of stones rolling under the feet of the camels and striking like gunshots at the foot of the precipices.

A strange march indeed. For the first few hours, I tried to pick out, by compass, the route we were following. But my calculations were soon upset; doubtless a mistake due to the swaying motion of the camel. I put the compass back in one of my saddle-bags. From that time on, Eg-Anteouen was our master. We could only trust ourselves to him.

He went first; Morhange followed him, and I brought up the rear. We passed at every step most curious specimens of volcanic rock. But I did not examine them. I was no longer interested in such things. Another kind of curiosity had taken possession of me. I had come to share Morhange's madness. If my companion had said to me: "We are doing a very rash thing. Let us go back to the known trails," I should have replied, "You are free to do as you please. But I am going on."

Toward evening of the second day, we found ourselves at the foot of a black mountain whose jagged ramparts towered in profile seven thousand feet above our heads. It was an enormous shadowy fortress, like the outline of a feudal stronghold silhouetted with incredible sharpness against the orange sky.

There was a well, with several trees, the first we had seen since cutting into Ahaggar.

A group of men were standing about it. Their camels, tethered close by, were cropping a mouthful here and there.

At seeing us, the men drew together, alert, on the defensive.

Eg-Anteouen turned to us and said:

"Eggali Tuareg."

We went toward them.