They sew it up again and when they have done this they steep it in a mineral salt, leaving it under for 70 days. At the end of 70 days they watch the corpse and they wrap the whole body in bandages of wax and cloth. These guys are serious about their belief that the afterworld counts. They want to make sure that the body is preserved. And as it's preserved and as it's mummified it's then put into a coffin and into a tomb where it's surrounded by everyday things that you would need to live. So they would leave food and jewelry and clothing as well as hymns and prayers and magic spells. And actually the Book of the Dead is a collection of all of these prayers and these hymns and these magical spells that were left behind with these mummified coffins for hope that they would pass the big test of the weighing of the heart in the afterlife.