Environments and Peoples of Nigeria: A Geographical Introduction to the History of Nigeria — R. K. Udo; Prehistory—Thurstan Shaw; Peoples ofthe Cross River Valley and The Eastern Niger Delta— E.J. Alagoa; Igboland Before 1800—A.E. Afigbo; The Peoples and Kingdoms of the Delta Province—Obaro Ikime; The Benin Kingdom—A.F.C. Ryder; Yorubaland up to 1800—I.A. Akinjogbin & E.A. Ayandele C; States and Peoples of the Niger-Benue Confluence Area—Ade Obafemi; Peoples of the Upper Benue Basin and the Bauchi Plateau Before 1800 — Sa’ad Abubakar; Kanem and Borno to 1808—J.E. Lavers; History of Islam up to 1800—S.A. Balogun; Nigeria Before 1800: Aspects of Economic Developments and Inter Group Relations—J.F. Ade Ajayi & E.J. Alagoa; The Trans-Atlantic Slave Trade—A.F.C. Ryder; The Eastern Nigeria and the Hinterland in the 19th Century— E.J. Alagoa; The Western Niger Delta and the Hinterland in the Nineteenth Century—Obaro Ikime; Yorubaland in the Nineteenth Century—J.F. Ade Ajayi & S.A. Akintoye; The Established Caliphate: Sokoto, The Emirates and their Neighbours—Sa-’ad Abubakar; Borno in the 19th Century—Sa’ad Abubakar; Islam and Christianity in Nigeria—T.G.O. Gbadamosi &J.F. Ade Ajayi; External Relations with Europeans: Explorers, Missionaries & Traders—E.A. Ayandele r; Nigeria in the Twentieth Century; British Colonial Administration in Nigeria—T.M. Tamuno; The Eastern Provinces under Colonial Rule—A.E. Afigbo; The Western Provinces under Colonial Rule - A.I. Asiwaju; The Northern Provinces under Colonial Rule—Sa’ad Abubakar; Economic Development in Nigeria since 1800—R.J. Gavin & Wale Oyemakinde; Constitutional Development 1861-1960—G.O. Olusanya; Nationalist Movements—G.O. Olusanya 28. Educational and Social Developments—S.O. Osoba & A. Fajana