I mention further the _Descrittione dell' Africa_ by Leon l'African, the _Arabian Histories_ of Ibn-Khaldoun, of Al-Iaquob, of El-Bekri, of Ibn-Batoutah, of Mahommed El-Tounsi.... In the midst of this Babel, I remember the names of only two volumes of contemporary French scholars. There were also the laborious theses of Berlioux[3] and of Schirmer.[4] [Footnote 3: Doctrina Ptolemaei ab injuria recentiorum vindicata, sive Nilus Superior et Niger verus, hodiernus Eghiren, ab anitiquis explorati. Paris, 8vo, 1874, with two maps. (Note by M. Leroux.)] [Footnote 4: De nomine et genere popularum qui berberi vulgo dicuntur. Paris, 8vo, 1892. (Note by M. Leroux.)] While I proceeded to make piles of as similar dimensions as possible I kept saying to myself: "To think that I have been believing all this time that in his mission with Morhange, Saint-Avit was particularly concerned in scientific observations. Either my memory deceives me strangely or he is riding a horse of another color. What is sure is that there is nothing for me in the midst of all this chaos." He must have read on my face the signs of too apparently expressed surprise, for he said in a tone in which I divined a tinge of defiance: "The choice of these books surprises you a bit?" "I can't say it surprises me," I replied, "since I don't know the nature of the work for which you have collected them. In any case I dare say, without fear of being contradicted, that never before has officer of the Arabian Office possessed a library in which the humanities were so, well represented." He smiled evasively, and that day we pursued the subject no further. Among Saint-Avit's books I had noticed a voluminous notebook secured by a strong lock. Several times I surprised him in the act of making notations in it. When for any reason he was called out of the room he placed his album carefully in a small cabinet of white wood, provided by the munificence of the Administration. When he was not writing and the office did not require his presence, he had the mehari which he had brought with him saddled, and a few minutes later, from the terrace of the fortifications, I could see the double silhouette disappearing with great strides behind a hummock of red earth on the horizon. Each time these trips lasted longer. From each he returned in a kind of exaltation which made me watch him with daily increasing disquietude during meal hours, the only time we passed quite alone together. "Well," I said to myself one day when his remarks had been more lacking in sequence than usual, "it's no fun being aboard a submarine when the captain takes opium. What drug can this fellow be taking, anyway?" Next day I looked hurriedly through my comrade's drawers. This inspection, which I believed to be my duty, reassured me momentarily. "All very good," I thought, "provided he does not carry with him his capsules and his Pravaz syringe."