The Negroland of the Arabs Examined and Explained (1841): Or an Enquiry into the Early History and Geography of Central Africa by William Desborough Cooley
Initially published in 1841 and written in language of the time, this is W.D Cooley's investigation which has formed a basis for future studies. His spirit for inquiry led him into the diverse fields of geography, mathematics, and linguistics and here is his inquiry into the Early History and Geography of Central Africa.