Facsimile 2 of the Book of Abraham is a type of document called a hypocephalus, an amuletic disc placed beneath the head of the mummies of priests or their relatives. The contents of hypocephali have forerunners in earlier Egyptian texts, and intriguingly, an extrabiblical text about Abraham seem to make allusions to the hypocephalus in Facsimile 2.
From BYU Studies Quarterly, volume 61, number 4.
