Naming of moons underworld, and Nix (a respelling of Nyx), mother of Charon, is the goddess of darkness and the night. Kerberos is a giant three-headed dog who guards the entrance to the underworld. The fifth moon is named for the river Styx that forms the boundary between the worlds of the living and the dead. The name of Eris's moon Dysnomia was suggested by its discoverer Michael E. Brown, who also suggested the name of the dwarf planet. The name has two meanings: in mythology Dysnomia (lawlessness) is the daughter of Eris (chaos). However, the name is also an intentional reference to
The Dog It Was That Died jumping off Waterloo Bridge into the Thames. However, the attempt goes wrong when he falls not into the water but onto a passing barge, breaking his legs and killing a dog which was on the deck. Over the course of the play, the reasons for this emerge. Some years ago, Purvis was approached by a Soviet spy named Rashnikov, who asked him to work as a double agent. Purvis reported this to his British superiors, who told him to pretend to work as a Soviet double agent whilst really working for them. However, Purvis also recalls that Rashnikov had told