Umbra

The Shadow or Spirit or Penumbra or Near Umbra or several other names is the spirit-world reflection of the physical world. It seems to reflect the most impactful part of a places history, so the Oxo Tower for example is currently full of art spaces but was previous used for heavy meat processing - hence it carries a weird mix of those two things, a smell of meat, memory? Ghost? spirit? people working, but also dancing and acting.

Interesting spirit stuff includes:

Name	Description
The Bell of Southwark	A Bell
St. Mary La Bow / Bow Bell	A Bell
Bromley by Bow Bell	A Bell
Big Ben	Linking Bell
Father Thames	Unclear
Music of the Celestial Realms	Heard by the pack via Southwark Bell
Tall Ships	Seen near warehouses
Pattern Spiders	Seen on ships and various buildings
Arches Court	Runs inside St. Mary La Bow Church
Dragon	Various dragons protect parts of London
Tower of London	Appears large?
Boatman	transport on the Thames