'The earliest existing plan, showing the disposition before 1780, implies that a hall with a parlour above it reached by a two-flight staircase had been added to the tower, probably in the fifteenth century, the kitchen offices being contained in a single-storey wing running southwards. The entry seems to have been at the base of the newel stairs to the tower. If this was so, Muncaster will then have resembled such existing habitations as Yanwath Hall or, on a larger scale, Sizergh Castle, in Westmorland. Probably in the sixteenth century accommodation had been increased by a north wing to contain a dining room, study, and further domestic offices.'