The Sotho of the North-Eastern Transvaal Lowveld occupy an area with fairly well-marked geographical boundaries. To the east, the Game Reserve, low-lying, unhealthy, very sparsely populated even in the old days, remains an effective barrier to contact with and further migrations from the Shangana-Tonga of Portuguese East Africa. South are the Olifants River and the towering Drakensberg range curving north-west then northwards to merge into the well-marked escarpment on the west dividing Lowveld from Highveld. On the north the Klein Letaba river roughly demarcates our area from the Venda and the Shangana-Tonga of the Knobnose Location. The Sotho-speaking Venda of Tswale and Moila, who fall well within this area, resemble in culture their Sotho-ized neighbours more than their own Venda kin to the north; but the Shangana- Tonga, who occupy most of the lower-lying eastern and north-eastern portion of the area and comprise at least one-third of its total population, are unassimilated strangers of different stock coming from the north-east and east. They have been entering since about 1840, usually in small bands, at first seeking the protection of and subjecting themselves to the Sotho owners of the land. On the arrival of the white man, some of their headmen were granted independent locations which have served as nuclei for the building up of more united tribal groups. (See accompanying map.)