 Predynastic and First Dynasty burial sites similar to Naqada were also found at Abydos, Sakkara, and Hieraconpolis.Versions of the Dynastic race model were adopted by scholars as L. A. Waddell, and Walter Bryan Emery, a former Chair of Egyptology at University College London.The dynastic race theory is no longer an accepted thesis in the field of predynastic archaeology.