The front parlour would have been located at the front, on the ground storey of the house.

This design is a duplicate of that designed by Adam in 1766 for the library in the home of Ellis Cunliffe in Wimbledon (Adam volume 22/166). The Cunliffe design is inscribed in pencil with the words, Parlor DY / 3d House, suggesting that Adam had considered reusing it in a parlour at the Adelphi, although he had perhaps originally intended it for another house. It is not known if this design was executed as there is no known photographic record of the chimneypiece prior to demolition.

The inscription on this drawing: And Back Parlor / 8t. House River front suggests that the design was intended to be duplicated in the back ground-floor room at number 7 Royal Terrace. This may have been the case, but this cannot be confirmed as there is no photographic record of that chimneypiece prior to demolition.