The natives of the Soudan fall roughly into two divisions—Arab and negro. Generally speaking, the Arabs are all north of a line drawn east and west some distance below Fashoda, the negroes south of it. But any precise classification of races is impossible. The Arabs, as a conquering race, imposed their religion and their language upon the original inhabitants. Many so-called Arab tribes are really almost negro. The confusion of blood is very great. Slavery has introduced a very strong negro element into many tribes whose Arabic descent is unquestioned. Sometimes, when the original race was not negro, they have preserved their own language. Thus, the people of Dongola speak a tongue of their own besides Arabic, and several of the nomad tribes in the Halfa-Suakin district are apparently not Arabic in descent. The inhabitants of Kordofan afford an example of the mixture of blood. The sedentary village population consists of the aboriginal inhabitants, with an admixture from Darfur. Under the Egyptian conquest a good deal of Turkish and Levantine blood was introduced, as well as negro blood from the South by means of slavery. The nomad tribes are a much superior race mentally and physically, and talk a much purer Arabic. Their great occupations are cattle-breeding, carried on by the Baggara tribes, and camel-breeding, carried on by the Kabbabish and the Beni Gerrar. Besides these there are also the hill tribes, negroes, very black in colour and small in stature, peaceful by nature, but warlike when roused by the attacks of the nomad Arabs. Of all the negro races in the Soudan, these are the most intelligent and hard-working.