The mirror bears the label of Thomas Ponsonby, ‘carver gilder and glass grinder’, who was listed at the 17 Piccadilly address from 1802-1819. Ponsonby's label appears on a mid-Georgian mirror in the collection of the Duke of Northumberland that was restored by him circa 1825 (C. Gilbert, Pictorial Dictionary of Marked London Furniture 1700-1840, Leeds,1996, p. 376, fig. 736). While not commonly known today, he received substantial patronage of the Royal family, with documented work at Buckingham Palace and Frogmore. (G. Beard and C. Gilbert, eds., Dictionary of English Furniture Makers 1660-1840, Leeds, 1986, p. 705).