Hi GLP, my Grandfather translated an English version of the book of the dead

He translated a French translation of the Papyrus of Ani (Egyptian book of the dead).
He told me that he believed that is was originally written by Thoth.
He was a freemason.
He told me that the Egyptians and other ancient societies believed that the physical body had to be preserved after death. He said never get cremated.
When he died his coffin was filled with epoxy resin and he had some gold artifacts in there but I am not sure why gold matters?