The several files that right describe the mummification process date to the Greco-Roman interval. Virtually all the papyri that have survived only describe the ceremonial rituals involved with embalming, not the actual surgical processes concerned. A text called The Ritual of Embalming does explain a few of the practical logistics https://mummified88777.dbblog.net/8482015/details-fiction-and-duct-tape-challenge