Allan Quatermain

 was a central character in Henry Rider Haggard's novels. The Fifth Doctor used one of the novels as research when he visited the Transvaal in 1877. When he met Haggard, he told him something of Allan Quatermain. (PROSE: White Man's Burden)

Quatermain was actually a real explorer, and friend of Haggard. He allowed for stories from his life to be expanded on by the author. Quatermain was hired by Helena to escort her to the legendary city of Kurr. (PROSE: The Three Faces of Helena)