I had to-day a conversation with a Tibboo of Tibesty. How interesting it is to talk with the natives of those untrodden countries, to which chance may some day lead us! He says Tibesty is ten days from Gatroun, and fourteen from Mourzuk. It is all mountainous, except one long wady where the population is located. There is no regular town; but all along the valley the population, which is said to be about 5000, though desert statistics are little to be credited, is scattered in groups of three or four, cultivating the ground and tending on the flocks which feed on the rich herbage, whilst goats scramble for food along the slopes of the boundary mountains. The people dwell either in huts or in caverns scooped out of the sides of hills, some of them very extensive. What a picture of primitive life! Families living separate, not yet driven to hide behind walls, or congregate in masses for safety. The desert is their bulwark. This place lies, indeed, far east of the caravan route from Bornou. There is no road direct eastward from Tibesty, but caravans can go south-east to Wadaï. The valley produces, besides other grain, a good quantity of ghaseb, which is the principal food of the inhabitants. Some palms rise here and there in clumps, but are not very productive; and dates are imported from Fezzan. The tree most frequent is the tholukh; but there is also another common tree, called the arak. In the open country, the wadan, the gazelle, and the ostrich are found, and the people hunt them with dogs. Good water is supplied by wells and streams, in sufficient quantities to irrigate the fields of ghaseb, wheat, and barley. Rain is abundant some years, but fails in others; torrents are continually descending from the mountains: one stream flows through a space of two days' journey. If these accounts be correct, the country must be one of the most interesting in Africa. They say, that on account the height of the mountains some of the inhabitants do not see the moon for fifteen days together. A Sultan rules paternally in this out-of-the-way country, where the Mohammedan religion reigns paramount. My informant made me pay three Tunisian piastres and two common handkerchiefs for a vocabulary of the language of the Tibboos of Tibesty. A visit to this singular oasis might repay a hardy traveller; but the people of the country have a faithless character, and it would be dangerous to trust to their promises of protection. The Tibesty Tibboos must not be confounded with the Tibboos of the salt-mines of Bilma, who have recently made their submission to the Porte. There is little connexion between the people, although they speak a similar language. The Bilma Tibboos lie in the direct route to Bornou, and were fully studied by the Denham and Clapperton expedition. _15th._--Continue to prepare papers to send home. Report the fact, that the functionaries of Mourzuk trade in slaves.