Clytie Potts was one of the original members of tractionist London. She was part of the historian's guild and survived the backfire of MEDUSA when she was pulled into the big blue whale model in the natural history museum by Chudleigh Pomeroy. She is the person who originally leads Tom back to London after he recognises her while travelling on the bird roads with his daughter Wren. When he meets her she pretends not to know him and goes under the fake name of Cruwys Morchard. Her ship is the Archaeopteryx, which is used by the static Londoners to gather supplies from the cities.