from this obvious case of comparison, which is so notorious through all The East and North Africa, as contrasted with the Christian States of America, the religion of the impostor of Mecca should be the religion of the divine morals of the New Testament, and the religion of The Saviour be the corrupt morals of the Koran. But if we were to judge of a religion and its morals from those who profess it, our ideas would soon get into confusion, and we should fall into the most deplorable errors. Began to-day to acquire a few words of the Nigritian languages. People are such geese, that when I learnt half-a-dozen words of what some call the "_black_" language, they thought me a prodigy. The Housa is the best and most frequently spoken language here of the Nigritian tongues. A New Testament, translated into this language, would or could be read by a third of the tribes of Central Africa. Asking my negro master what _I_ was, he replied, "_Kerdee_," which means _kafer_ ("infidel") in Bornou, the negro mistaking my individual self for the pronoun _I_, which is _oomah_. I laughed heartily at the fellow's impudence. This afternoon, visited the ancient tower, about half a mile distant, westwards, from the walls of Ghadames. My turjeman, who was _cicerone_, informed me that the tower was built by the Christians, and was a watch-tower to give alarm to the city in case of an attack from banditti or other enemies. There is another like it in the mountains to the north-west, where are also scattered some old masonry of other buildings. We mounted the top of the tower, and found a hollowed space at the top, of this shape-- [Illustration] twenty feet long, eight broad, and about five deep. It was evidently a cistern or tank for the troops, for we saw a hole at the broad end, from which the water ran out. The tower itself was about forty feet in diameter. How high it had been, we could not now tell; but the cistern is placed nearly at the top of what remains of the tower. Probably the water ran down into the lower rooms. From the tops of the ruins there was a commanding view of the oasis, and the surrounding Desert. On our way we passed a very deep, dry well, and the wall-remains of several ancient gardens. The turjeman says the water of Ghadames diminishes, and was formerly much more abundant. _11th._--This morning cooler than any yet. My eyes are now nearly restored from the attack of ophthalmia which I had in Tripoli; they open always with a little pain in the morning. It is frightful to observe how many people here have their eyes injured. A poor camel-driver said to me, "Alas! since I went that road to Ghat, I have been nearly blind. The sand and rock were too bright for them."