AFRICA, the Dark Continent that was a mystery to our grandfathers, is little less of a mystery to us—even after sixty years of exploration and colonization and annexation and exploitation have done their worst. Sir Frederick Lugard 's experience of Africa dates back to 1885, when ho served in the Sudan ; three years later he was wounded by slave-dealers on Lake Nyasa , and since then he has held many administrative posts in both West and East Africa, finally being Governor-General of Nigeria from 1914 to 1919. Obviously, therefore, his opportunities of forming an opinion on Africa's many problems have been exceptionally large.