The Book of the Dead: Ani’s particular papyrus.
A museum record places funerary texts and imagery in an identified manuscript.

Start with one sheet
The British Museum record for EA10470,35 identifies a frame of the Papyrus of Ani and the spells represented there. A precise accession connects the discussion to a surviving object. British Museum ↗
A witness has its own contents
Do not assume that every manuscript bearing the modern title Book of the Dead contains an identical selection or arrangement. The image and passage being discussed need identification. British Museum ↗
Read belief as historical evidence
Funerary imagery and texts preserve religious conceptions. They do not independently verify the literal geography of an afterlife or the existence of a modern proposed monument. British Museum ↗