London

When it came, it was crowded. The seats in the upper compartment were packed with arrogant looking men and women from the Guild of Engineers, the most powerful of the four Great Guilds which ran London.

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“Never forget, Apprentices, that we Historians are the most important Guild in our city. We don’t make as much money as the Merchants, but we create knowledge, which is worth a great deal more. We may not be responsible for steering London, like the Navigators, but where would the Navigators be if we hadn’t preserved the ancient maps and charts? And as for the Guild of Engineers, just remember that every machine they have ever developed is based on some fragment of Old-Tech—ancient high technology that our museum keepers have preserved or our archaeologists have dug up.”

Chapter 2: Valentine, Mortal Engines, pg 13/152