Answers
From Fallen London Wiki (Staging)
"Six letters. Starts with 'A'. 'Bought with a city'." - Albert, Prince Consort, who Victoria sold London for. Caveat emptor.
"Eleven letters. Starts with 'C'. 'Masters of the Bazaar'. No, that makes no sense at all." - Chiropteran; the Masters are space bats. "Seven letters. Starts with 'M'. 'The Vake'. Well, that's hardly a challenge." - Mystery or Missing, depending on your progress through BaL.
