...r a Interpreting Geographical Patterns of Y Chromosome Variation 235 zone of cultural overlap versus an absolute boundary (Wilkinson 1999 after Hoffman 1982, and citing evidence from Needler 1984 and =-=Adams 1996-=-). Hoffman (1982) noted cattle burials in Hierakonpolis, the most important of predynastic upper Egyptian cities in the later predynastic. This custom might reflect Nubian cultural impact, a common cu...