Ostrich feathers and ambergris are collected on the confines of the Desert, and are added to the merchandize before mentioned. The gold jewels of Jinnie[207] are denominated by the Arabs El Herrez, from the supposed charm they contain; they are invariably of pure gold, and some of them of exquisite workmanship, and of various forms, but hollow in the middle for the purpose of containing the Herrez, or amulet, which consists of passages from the Koran, arranged in some geometrical figure, on paper, which being enclosed in the gold jewel, is suspended from the neck, or tied round the arms, legs, or elsewhere. These charms have various and particular powers attributed to them, some insuring the wearer against the effects of an evil eye, others from an evil mind; some are intended to secure a continuation of prosperity and happiness, or to avert misfortune, whilst others secure to the wearer health and strength. This superstition, and predilection for charms, pervades the greater part of Africa: thus, in the northern maritime states, in Suse, and other parts of Bled-el-jerrêde, the fakeers, or saints, attach half a hundred Herrez (without, however, the gold covering, for which they substitute a leathern one) to different parts of their body, and even to the horses: at Marocco I have seen eleven round one horse’s neck.[208] The inhabitants of these countries imagine no disorder incident to mankind can attack either man or beast without the aid of some (jin) spirit, or departed soul, or (drubba del’ain) an evil eye. The slaves brought by the akkabaahs are more or less valuable in Barbary, according to their beauty and symmetry of person, and also according to their age, and the country from whence they are procured: thus a Wangareen slave is not worth so much as one from Houssa; the former being a gross, stupid people, little superior in understanding to the brute creation, whilst those of Houssa are intelligent, industrious, acute, and possess a peculiarly open and noble countenance, having prominent noses, and expressive black eyes: those of Wangara, on the contrary, have large mouths, thick lips, broad flat noses, and heavy eyes. A young girl of Houssa, of exquisite beauty, was once sold at Marocco, whilst I was there, for four hundred ducats,[209] whilst the average price of slaves is about one hundred, so much depends on the fancy, or the imagination of the purchaser.