Arabia, a vast peninsula between the Persian Gulf, the Indian Ocean, and the Red Sea, forms the link between Asia and Africa. It is connected with Asia by the arid plains extending northward to the Euphrates; with Africa, by the equally arid isthmus of Suez. Though the country is more than one- third the size of the United States (excluding Alaska), it has never supported a large population. The interior, except for occasional oases, is a desert, inhabited only by wandering tribes. Along the southern and western coasts, between the mountains and the sea, the soil is generally fertile, the climate temperate, and the rainfall sufficient. Here the chief cities and towns are located. INHABITANTS OF ARABIA The original home of the Semites is believed to have been Arabia. Some Semitic peoples appear to have migrated northward to Babylonia and Syria, while others crossed the Red Sea to Abyssinia. Physically, the Arabs are an attractive people, with well-shaped, muscular figures, handsome, bronzed faces, brilliant, black eyes, and all the organs of sense exquisitely acute. Simple and abstemious in their habits, they lead healthy lives and often reach an extreme yet vigorous old age. THE BEDOUINS OF THE DESERT The Bedouin Arabs, by which name the nomadic inhabitants of the desert are known, claim Ishmael, the son of Abraham and half-brother of Isaac, as their ancestor. The life which they lead in the Arabian wilderness closely resembles that of the Hebrew patriarchs, as described in the Old Testament. The Bedouins are shepherds and herdsmen, continually moving with their sheep and camels from one pasturage and water-hole to another. Their virtues--hospitality to the stranger, generosity, faithfulness to the ties of kinship--are those of a nomadic, barbarian people. Such also are their vices--love of fighting and plunder, revengefulness, and impatience of restraint. Nothing like a settled government is known to them. The only tribal authority is that of the chief, or "sheik," who, because of his birth, courage, or wealth, has been chosen to the leadership. This description of the Bedouins to-day applies equally well to them in the age of Mohammed, during the sixth century. [Illustration: MECCA The chief sanctuary of Mecca is the building called the Kaaba, which lies in the center of a vast courtyard surrounded by a colonnade. The Kaaba is here seen covered with a heavy black cloth renewed each year. Pilgrims enter the courtyard, walk slowly around the Kaaba seven times--seven is a holy number in Islam--and kiss the sacred black stone fixed in the walls of the structure. The stone is now broken into pieces, which are kept together by a silver setting. The Kaaba has been rebuilt several times since the days of Mohammed, but it still preserves the old form of a heathen temple.] THE SEDENTARY ARABS