Its serpentined frame is designed in the George II French 'picturesque' style popularised by Thomas Chippendale's Gentleman and Cabinet-Maker's Director, 1754. The tripartite overmantel-glass with foliate branches for candles is surmounted by an oval glass with branches emerging from its mirrored borders, and a 'cartouche' head-glass set in an asymmetrically scrolled cornice. Its form and rustic elements relate to overmantel designs executed in the late 1750s by William Linnell (d. 1763), cabinet-maker and upholsterer of Berkeley Square (see: H. Hayward, 'The Drawings of John Linnell in the Victoria & Albert Museum', Furniture History Journal, Leeds, 1969, figs. 140, 142 and 160).
A related overmantel frame incorporating an oval landscape-painting dated 1761 is illustrated G. Wills, English Looking-Glasses, London, 1965, fig. 127