From the tomb of Hornedjitef
From the time of the 18th dynasty (c. 1539 to c. 1292 BCE), a rolled up copy of the Book of the Dead was put into a compartment in the base of the statue.
The god Osiris was considered to be the father of Horus.
Filer, Joyce, The Mystery of the Egyptian Mummy. New York- Oxford Univ. Press, 2003.