The chamber designated here as the back drawing room is located at the back on the first storey of the building.

This design was not executed at number 1 Robert Street, and instead minor alterations were made to a design intended for a room at number 1 York Buildings (Adam volume 13/44), with oval medallions rather than round ones, which survived to be photographed by the LCC in 1936. This design was executed in the front drawing room at number 2 Robert Street. It survives and was photographed by the LCC in 1962.