Northern Rhodesia the British South Africa Company administered territory of North-Western Rhodesia (now in Zambia), and Portuguese Angola although its boundary with Angola was not marked-out on the ground until later. The northern border of the British territory in North-Eastern Rhodesia and the British Central Africa Protectorate was agreed as part of an Anglo-German Convention in 1890, which also fixed the very short boundary between North-Western Rhodesia and German South-West Africa, now Namibia. The boundary between the Congo Free State and British territory was fixed by a treaty in 1894, although there were some minor adjustments up to the 1930s. Boundaries with
Northern Rhodesia five shillings a year, but in 1920 the rate of hut tax was sharply increased, and often doubled, to provide more workers for the Southern Rhodesian mines, particularly the coal mines of Wankie. At this time the Company considered the principal economic benefit of Northern Rhodesia to be as a reservoir for migrant labour which could be called upon for Southern Rhodesia. British common law became the basis of the administration of Southern and Northern Rhodesia, unlike Roman Dutch law which applied in South Africa. In 1889, the British South African Company was given the power to establish a police