The back parlour or dining room survives relatively intact, including its ceiling with its insert grisaille paintings. The room constructed by Wyatt formed a 40ft rectangular space with a screen across the south end. Harris notes Adam’s alterations to Wyatt’s design, including the removal of the screen and the formation of an apsidal end which contained an arched door linking to the front parlour.

Adam also altered the existing ceiling, introducing the grisaille panel inserts and oval paintings. Harris highlights the absence of the five oval paintings by Zucchi, removed at a later date.

There is a design for a carpet intended for the back parlour. Although no carpet survives, Harris notes paint samples from this room in shades of pink matching that of the carpet, possibly suggesting its execution.

In c1930 Hussey and Oswald recorded the absence of the hanging bronze lamps designed for the niches and of the candelabra brackets.