Maloran, Jewel of Thassilon
Milton is from the Absalom Arcanamirium and is the foremost expert on ancient Thassilon
While normally an expert of ancient Thassilon would be a prominent individual, not so with Milton. In fact, he is a beleagured chap with a runny nose, rotund physique and thick glasses that cover beady eyes.
He is an expert in his field however, and the party has leveraged him to provide information (including a map!) of the City of Cities.
He currently resides in Maldoran near the Temple of Desna.