Paper III completes the core argument of the Zep Tepi Series. Paper I identified the Richat Structure in Mauritania as the sole surviving candidate Saharan origin site through systematic elimination of 14 formations. Paper II documented genomic endpoints at both corridor termini (Takarkori → Nuwayrat) and the Wedjat as a sky-schema encoding the Canopus gradient observed during northeastward migration. Egypt itself preserved a consistent answer to the question of its origins: the Shemsu Hor (Followers of Horus). They occupy a non-optional structural slot in Egyptian king-list architecture across fifteen centuries of independent sources: the Turin Royal Canon, Pyramid Texts, state inscriptions, and temple-building traditions. Later pharaohs cite their written annals. Ptolemaic builders cite a leather roll from their time containing architectural plans. This archival specificity is without clear parallel among the ancient king-list traditions surveyed here. Four primary lines of evidence: Archaeological: Five Saharan pastoral markers appear together at the HK6 elite cemetery at Hierakonpolis within the 3800–3100 BCE window, supported by skeletal morphological diversity that requires population movement rather than diffusion. Astronomical: A statistically significant Canopus orientation family appears across 350+ Egyptian temples (Shaltout/Belmonte surveys), tracking precession over 2,000 years — a pattern whose full cultural significance remains an open question in the archaeoastronomical literature. Chronological: Three independent chronologies (climate, textual, archaeological) converge on the 3800–3100 BCE window. Textual: The Shemsu Hor are a fixed category in the king-list tradition, structurally positioned between the gods and the first human kings. The Edfu Building Texts provide structural corroboration: a cosmogonic narrative of a first sacred domain, its destruction, and its re-founding by divine builders — a structure consonant with the corridor model examined in Paper III. Six methodologically independent lines — paleohydrology, genetics, archaeology, archaeoastronomy, textual criticism, and climate chronology — converge on the Saharan corridor migration model as the most parsimonious explanation for the attested data. The model does not claim demonstration. It establishes priority for decisive tests using existing museum collections: isotopic and aDNA analysis of Predynastic elite contexts, geochemical sourcing of Naqada II hard-stone vessels against the Richat carbonatite signature, and A-Group aDNA. This is the third paper in the Zep Tepi Series.
Sefy Levy (Wed,) studied this question.