How is the burial ceremony performed in the novel, Eaters of the Dead: The Manuscript of Ibn Fadlan?

In the Viking tradition when a warrior dies, there is an elaborate ceremony which must be conducted. The body of the deceased must be lain out under cover for the duration of the preparations. A boat is built in which all manner of items for the afterlife are secured: food, weapons, horses, items from the dead man's home. Then a woman must volunteer to die alongside the warrior. She first visits each man who was a close friend of the dead warrior and each man takes his turn having sex with her. She is then led into the hut which houses the body and the Angel of Death stabs her while two warriors strangle her with a cord wrapped about her neck. The two bodies are then laid in the boat and the entire vessel is put to flame.