Horus as bright as the sun was explained by a tale, known as "The Contendings of Horus and Seth". In this tale, it was said that Set, the patron of Upper Egypt, and Horus, the patron of Lower Egypt, had battled for Egypt brutally, with neither side victorious, until eventually the gods sided with Horus. As Horus was the ultimate victor he became known as "ḥr.w wr" "Horus the Great", but more usually translated "Horus the Elder". In the struggle, Set had lost a testicle, and Horus's eye was gouged out. Horus represented the eclipsing binary Algol in the Calendar of
The Contendings of Horus and Seth the eighteenth dynasty. Many researchers and Egyptologists have dealt with "The Contendings of Horus and Seth". John Gwyn Griffiths, for example, talks about the whole conflict between Horus and Seth in his book "The Conflict of Horus and Seth". In the book, Griffiths discusses the different aspects of the ongoing battle for the office of Osiris, including the mutilations, homosexual episode, and the trial. Griffiths argues that the myth is of political and historical origin and that the story of Horus and Seth has to do with tribal struggles before the unification of Egypt. Other historians have discarded this idea