There's tons of material out there Robin Walker's recent book deals with these issues. The work of Anta Diop coming from his Phd thesis is a classic African Origins of Civilisation Myth or Reality which for me is one of the most impressive pieces of academic inquiry I have ever read. When you can prove your hypothesis via seven different methodologies you know it is a bad man you are dealing with..Go to National Black United Front website and look for the John H Clarke Gallery and there are references in his work like grains of rice...