sentences:  Reynolds states in the afterword to the collection that the stories are set in rough chronological order, with "Great Wall of Mars" occurring around AD 2200, whilst Galactic North extends to AD 40 000
  
  In this short story, we meet Nevil Clavain, one of the protagonists of the Revelation Space cycle; Galiana, the founder of the Conjoiner faction; and Sandra Voi, an important person in the Demarchist faction.The story begins on Deimos, where Nevil Clavain, a high-ranking officer in the Coalition for Neural Purity is preparing to go down to the surface of Mars.His brother, Warren, is pushing for war with the Conjoiners.