Mortimer's home, Gravesend, sits on a dozen or so acres of mostly wooded land a few miles outside of New Seagate. The main building is a fortified manor house, and there are a number of barn-sized workshop outbuildings, most containing enormous machinery and experimental Graves Steam Engines.

Visitors riding in through the open gates, above which appear Mortimer's arms, will be met by a scene of domestic activity bordering on chaos, and comprised in part of a gaggle of children, various fantastical and domesticated animals, and innumerable cats.

If time permits Mortimer will generally invite visiting fellow Guild members (and sundry other persons of his acquaintance) to tour the grounds a little and then have tea and scones.

Some of the tower of the manor house is occupied by workrooms for alchemical, herbal, and other pursuits, but the majority of the space is dedicated to Mortimer's library.