grimly determined to stay in their hiding-places. I trusted him, and was rewarded for doing so, for he stayed at my disposition upwards of a week, and thanks to his knowledge of the country I was able to go on with my exploration as rapidly as possible, and to collect interesting geographical information about the regions that lay off the track of my journey. To go to Bardai we had only to follow the sandy bed of the dried-up river, along which from time to time we passed by palm plantations and villages, the headmen of which came to bid me welcome, pleading their poverty as an excuse for not offering me the customary presents. After twelve hours’ march, when I had just passed through the village of Zoui, I met Lieut. Blaizot, commanding the troops of Tibesti, coming on foot to meet and welcome me and to express his regret that he had not been able, for want of camels, to come to Zoumri and Yebbi to help me against the rebels. To see him and to listen to his voice as he spoke were a great joy to me. In spite of all difficulties, I had just effected the junction so long desired between the troops of Borkou and those of Tibesti; in a few more minutes I was going at last to enter the palm plantation of Bardai that I had been dreaming of seeing for twenty years, ever since I had read in Nachtigal’s impressive story of his travels about the difficulties he had to get over in order to enter it forty-six years before, and above all to get out of it alive. On the way I had been able to make a mass of observations, topographical, geodetic, and hypsometric, and to fix with a very satisfactory degree of precision the situation and height of the chief summits of the great western chain that Nachtigal had only been able to locate by guesswork, and often without having even seen them. At Bardai, where I arrived on October 13 a little before noon, I stayed only twenty-four hours, for I was in a hurry to get back to Miski, where the little detachment left in charge of the broken-down camels and of my last reserves of food must have been in a situation of some insecurity since the 10th. During the afternoon of the 13th I was able to examine in detail with the commander of the garrison the various questions regarding the means of combining the efforts of the troops of Borkou and those of the Tibesti against the rebels. The night having been favourable to my astronomical observations and the morning to measurements of angles on the principal peaks visible from Bardai, I had been able in that short space of time to collect all the essential elements needed for fixing on the map with satisfactory exactitude the position of the most important points of Central Tibesti.