



Lot 37TP
Gainsborough Dupont(Sudbury 1754-1797 London)Portrait of William Mainwaring, full length, in a black coat and breeches and a white shirt, leaning on a pillar
3 December 2025, 14:00 GMT
London, New Bond Street£15,000 - £20,000
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Gainsborough Dupont (Sudbury 1754-1797 London)
Portrait of William Mainwaring, full length, in a black coat and breeches and a white shirt, leaning on a pillar
oil on canvas
236.2 x 153.7cm (93 x 60 1/2in).
oil on canvas
236.2 x 153.7cm (93 x 60 1/2in).
Footnotes
Provenance
With The Middlesex Guildhall Art Collection, on loan to the Supreme Court
Exhibited
The Royal Academy, London, 1793, no. 143
Engraved
John Jones, 1794 (see NPG D38148)
William Mainwaring was born in 1735, and was the eldest son of architect Boulton Mainwaring of Isleworth, Middlesex. He was educated at Merchant Taylors' School, and then entered Lincolns' Inn in 1754 to be called to the bar in 1759. He was elected to serve as MP for Middlesex from 1784 to 1800. His son, George Boulton Mainwaring, also served as MP for Middlesex from 1806.