Lord Mansfield's dressing room, originally the first drawing room, is located on the ground floor, on the south front of the central block, and was redecorated by Adam immediately after the main reception rooms.

Although Adam volume 23/234 is inscribed as being for the library, all three drawings clearly relate to one another, and to the executed chimneypiece in Lord Mansfield's dressing room. In the executed version the entablature of the pilasters is moved down, effectively becoming applied ornament along the stile, and with the rosette from Adam volume 24/182. The frieze has the same tablet as Adam volumes 23/131 and 24/182, and the ox skull and festoon motifs of Adam volume 24/182. This possibly misleading inscription on Adam volume 23/234 suggests that Lord Mansfield had used his dressing room to store books prior to the construction of the new library wing at Kenwood.

A twentieth-century reproduction of this chimneypiece is to be found in Lady Mansfield's sitting-cum-dressing room, albeit without the rosettes.

There is no documentary evidence that the chair in Adam volume 24/182 was at Kenwood. Julius Bryant has noted that this chair does not correlate with Adam's typical style, and therefore may be a sketch of a chair which Adam had seen and wanted to record.