Dinka is the name given to a congeries of independent tribes spread over a vast area, stretching from 300 miles south of Khartum to within 100 miles of Gondokoro, and reaching many miles to the west in the Bahr-el-Ghazal Province. All these tribes according to C. G. Seligman[216] call themselves _Jieng_ or _Jenge_, corrupted by the Arabs into Dinka; but no Dinka nation has arisen, for the tribes have never recognised a supreme chief, as do their neighbours, the Shilluk, nor have they even been united under a military despot, as the Zulu were united under Chaka. They differ in manners and customs and even in physique and are often at war with one another. One of the most obvious distinctions in habits is between the relatively powerful cattle-owning Dinka and the small and comparatively poor tribes who have no cattle and scarcely cultivate the ground, but live in the marshes in the neighbourhood of the Sudd, and depend largely for their sustenance on fishing and hippopotamus-hunting. Their villages, which are generally dirty and evil-smelling, are built on ground which rises but little above the reed-covered surface of the country. The Dinka community is largely autonomous under leadership of a chief or headman (_bain_) who is sometimes merely the local magician, but in one community in each tribe he is the hereditary rain-maker whose wish is law. "Cattle form the economic basis of Dinka society; ... they are the currency in which bride-price and blood-fines are paid; and the desire to acquire a neighbour's herds is the common cause of those inter-tribal raids which constitute Dinka warfare." Some uniformity appears to prevail amongst the languages of the Nile-Welle lands, and from the rather scanty materials collected by Junker, Fr. Mueller was able to construct an "Equatorial Linguistic Family," including the Mangbattu, Zandeh, Barmbo, Madi, Bangba, Krej, Golo and others, on both sides of the water-parting. Leo Reinisch, however, was not convinced, and in a letter addressed to the author declared that "in the absence of sentences it is impossible to determine the grammatical structure of Mangbattu and the other languages. At the same time we may detect certain relations, not to the Nilotic, but the Bantu tongues. It may therefore be inferred that Mangbattu and the others have a tolerably close relationship to the Bantu, and may even be remotely akin to it, judging from their tendency to prefix formations[217]." Future research will show how far this conjecture is justified. Although Islam has made considerable progress, throughout the greater part of the Sudanese region, though not among the Nilotic tribes, the bulk of the people are still practically pagan. Witchcraft continues to flourish amongst the equatorial peoples, and important events are almost everywhere attended by sanguinary rites. These are absent among the true Nilotics. The Dinka are totemic, with ancestor-worship. The Shilluk have a cult of divine kings.