Marcurian guild (cf. Guild of Tourism & Guild of Sidekicks) that presumably regulates the sale of all goods and services in the city. We learn several of their refulations from Karek the map seller.
- Members must protect the personal details of their customers, as when Karek refuse to give April the Brian Westhouse's address.
- They charge a fee to provide Guild-approved employees, as when April offers to replace Ulen the errand boy, Karek accepts so as to avoid having to pay the fee.
- They seem to filter members' business, as Karek is denied jobs if his deliveries are not signed for.