They keep themselves very much apart from all other people, and they consider the Mzab as a holy corner of the earth. The Arabs who live in this wilderness are kept quite separate, with a quarter and a mosque of their own, and, while mutually despising one another, are usually the servants of the Mzabites. The Jews likewise who are found in Ghardaïa itself, not only have a reserved quarter of the town but they also wear a peculiar dress, and are treated with the utmost contempt. In fact, in all ways the people of the Mzab are quite different from any other race in North Africa, and the study of their history and customs would give material for a lengthy book. It is hoped, however, that these few pages will enable the traveler to realize that he is no longer among the simple Arabs of the great plain, but in the midst of a strange people whose origin will always remain a mystery. CHAPTER XXX GHARDAIA AND ADJOINING TOWNS During the journey south we have passed Berriane, the outpost of the Mzab, and of later foundation than the other towns. Guerrera is on the journey to Touggourt; the remaining five towns of the confederation are before us in this kind of desolate rock crater. The most important and the largest of them is Ghardaïa, lying at the foot of the military _bordj_, where it is necessary to pass the night. On a rocky eminence to the east is Melika, further on, the holy city of Beni Sgen, and out of sight, but only a few miles distant, are Bou Noura and El Ateuf. To the south again there is another oasis called Metlili, which some people erroneously comprise in the confederation of the Mzab, but though in many ways it has Mzabite characteristics it is in reality a town of the tribe of the Chambas, nomads who inhabit a vast area of the Sahara beyond Ghardaïa. The first thing that strikes one as one looks at Ghardaïa is the way the houses pile themselves up into a heap, rather like a giant ant-hill which is, in its turn, surmounted by the minaret made of mud, resembling an obelisk with little holes in the top. Moreover, if we turn and look at Melika and Beni Sgen we are struck by the same similarity of construction which we saw at Berriane and which we shall see in all the towns of the Mzab.