Amulet of Hapy, Son of Horus, baboon head, damaged and repaired. The Four Sons of Horus, Duamutef, Qebehsenuef, Imsety and Hapy are first mentioned in the Old Kingdom as 'friends of the king'. Later they became responsible for the protection of the internal organs removed during mummification. Amulets of the four were often placed in mummy wrappings.