The hausa cities are many of them important, but few are as large as the Yoruba cities and they lie farther apart.
"The Negro"
W.E.B. Du Bois
Beyond the hausa states and bordering on Lake Chad was Bornu.
"The Negro"
W.E.B. Du Bois
Civilization received new impetus and a wave of Mohammedanism swept eastward, erecting the great kingdoms of Melle, the Songhay, Bornu, and the hausa states.
"The Negro"
W.E.B. Du Bois