Four sons of Horus Nekhen. In Spells 112 and 113 of the Book of the Dead which have their origins in the earlier Coffin Texts Spells 157 and 158, it is described how Horus has his eye injured, and because of this is given the sons of Horus: The injury of Horus's eye is part of the myth cycle known as the Contending of Horus and Set recounting how they fought over the crown of Egypt. In a unique illustration in the tomb of Ay the sons of Horus are shown wearing the red and white crowns as the Souls of Pe and Nekhen,
Horus name reaches back to the time of the Naqada II period at 3400 BC, and its development can be observed on objects from Naqada II to the 1st Dynasty. However, at the time of introduction, the serekhs of kings were yet anonymous. Later the name of the king was written beside the serekh or omitted completely. In many cases the serekh lacks the Horus falcon, and in other cases, such as the serekh of king Ka, the serekh seems to be held by Horus upside-down. During the middle and late Naqada III period (3200 - 3030 BC.), kings started to write