 The family also shared Abney House with a series of well-to-do tenants, who paid for various floors and parts of the house.This kept it homely, warm, and constantly lived-in during periods when the family lived in Hertfordshire.Lady Mary granted Watts sole use of a study room, the rooftop turret also called the observatory room, from which he could survey the heavens as well as the whole of Abney Park.