It is not possible to assign a date range to this drawing as it is included in a volume of record drawings: drawn directly on to the page rather than pasted in. As such this collection of record drawings appears to have been produced as a complete work and may have been compiled some time after the work at 25 Grosvenor Square.

That Adam took the trouble to design a frieze for each of the rooms for which he had designed a ceiling, suggests that this work was executed. See scheme notes.