Period; more specifically, while possibly dating much earlier than 10,000 BP, rock art walls from the Bubaline Period have been dated between 9200 BP and 5500 BP. The cultural practice of circumcision may have spread from the Central Sahara, toward the south in Sub-Saharan Africa and toward the east in the region of the Nile. West Africa The Nomoli figurines, which were created by the Mende people in Sierra Leone and depict male circumcised genitalia, have been dated between the 7th century CE and the 8th century CE. Central and East Africa Prior to 300 CE, male circumcision, which is a cultural practice that is part of male initiations, is estimated to have existed in Africa for more than 9000 years. By 300 CE, male initiation and male circumcision had ceased among matrilineal Bantu-speaking peoples in East Africa and Central Africa. Agatharchides of Cnidus (2nd century BCE) indicated that "troglodyte" ethnic groups practiced circumcision; these groups may have resided along the African coast of the Red Sea in southern Egypt or near the Gulf of Zula in present-day Eritrea; while most of these groups practiced a form of circumcision that involved partial excision, the ethnic group, identified by Agatharchides as the "Colobi" ("the mutilated"), were indicated to have practiced a form of circumcision that involved total excision. Herodotus (5th century BCE) indicated that ancient Ethiopians practiced circumcision. Southern Africa In the 19th century CE, Shaka, a Zulu king, prohibited male circumcision due to concerns that young circumcised men might be less interested in joining as warriors in the military force he was amassing and uniting in the region of southern Africa and might be more interested in seeking opportunities for having sex. Egypt According to studies, the Egyptian rite of circumcision, which was performed at the age of puberty, did not involve the amputation of an annular piece of the foreskin as in the Jewish rite. Instead, it would have involved excising a triangular section, or alternately just creating a longitudinal incision, in the dorsal face of the foreskin. This is supported by artworks and statues showing foreskins, some of which present an incision on the glans, not an annular circumcision. However, there is also evidence of individuals circumcised the traditional way. The rite might have mutated into this variation by the time Herodotus visited Egypt. Circumcisions were performed by priests in a public ceremony using a stone blade. It