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Born May 18, 1788, in Annan, Scotland; died Apr. 13, 1827, near Sokoto. English explorer of Africa.
Together with the English travelers W. Oudney and D. Denham, Clapperton crossed the Sahara from Tripoli to Lake Chad (along 15° E long.) in 1822–23, reaching Sokoto. The journey established that the Niger River is not connected with Lake Chad. Returning in 1824, he recrossed the Sahara. In 1825 Clapperton traveled to Sokoto from Lagos on the Gulf of Guinea.