The population of Tozar amounts to about five thousand,—for the most part of a swarthy complexion, with a cast of features bordering upon that of the Negro. Indeed every fresh stage one makes in the journey into Central Africa, a gradual change is perceptible in the features and complexion of the population,—the white man, by a slow but invariable process, changing into a Negro. “Were it possible,” says Mr Davis, “to introduce into Europe an ethnological collection, classified latitudinally, from the northern coast to Central Africa, the greatest sceptic might be convinced of the fact, that _time_ and _place_ alone made our coloured fellow-creatures what they are. The slave-dealer, and the Negro-dealer, might thus have an ocular demonstration of the great truth, that the black man is our brother, and that circumstances alone, with the nature of which we are not fully acquainted, made him to differ from us.” He mentions, as an additional proof of this, that even among the Jews (who, he says, “have probably lived in this part of Africa from the time the Phœnicians first settled here”) a striking difference is perceptible between those on the coast and those residing in the interior. He adds the curious fact, that in the desert the Jews certainly do not live for many centuries; and thence deduces the conclusion, that if its influence is so clearly shown in them, both as regards colour and features, it is not to be wondered that it should have told to a much greater extent on those to whom the Sahara has been a home for thousands of years. Of all these vari-coloured sections of the North African population, the most merry and gay are unquestionably the Negroes, whether male or female. To ask a Moor or an Arab if he danced, would be to offer him a serious insult—the former especially being too grave to have a regard even for music. But the black people are almost always cheerful, and enjoy life even when in a state of bondage. “Often have I seen them,” says Mr Davis, “congregated by hundreds in some open space, singing and dancing, and playing, for hours consecutively. The ability of the Negro to accommodate himself to circumstances is surprising. What would depress and crush a white man is supported with a marvellous resignation by the black, whose light heart enables him to toil and to sing, to suffer, and yet not despair.”