Arthur Cornwallis Madan (1846–1917) was a British linguist and Anglican missionary who became famous for his research on African languages and his Swahili dictionaries.
[1] In 1880 he was sent to Zanzibar, where he learned Swahili and assisted bishop Edward Steere in his language research and translation work.
("A handbook of the Swahili language as spoken at Zanzibar, edited for the Universities' Mission to Central Africa").
Initially this was a pioneer's work, as Ludwig Krapf's dictionary of Swahili, the first for this language, had not yet been published.
1906 Madan moved to Northern Rhodesia (today: Zambia), where he continued researching a number of African languages like Lenje and Wisa.