How much of southern Africa was under british control in 1860?

By 1860, the British controlled some parts of Southern Africa, including the Cape Colony, the Natal Colony, and the Orange River Sovereignty. The Cape Colony was established in 1652 and was the oldest British colony in the region. The Natal Colony was established in 1843 and was located in the eastern part of Southern Africa. The Orange Free State was established in 1854 and was located in the central part of Southern Africa. So, nearly 25-30 percent of Southern Africa was under British control in 1860.