He hums in his throat. "I'm not really a historian or anthropologist, but I think people were often buried with items because those still living thought they might need them in the afterlife. The pharaoh's tombs of Ancient Egypt come to mind, or burying people with coins to pay the ferryman to cross the river Styx."

Malcolm smiles. "The reason you can't imagine wanting to keep a memento from killing someone is because you're not a psychopath." Aren't you glad, Kate?