Clapperton, Captain Hugh, an African explorer, born at Annan; bred in the navy, joined two expeditions into Central Africa to ascertain the length and course of the Niger, but got no farther than Sokoto, where he was attacked with dysentery and died (1788‒1827).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Clapham * Clärchen