The triumphal arched frame, with Roman medallion wreathed by a flowered and water-scalloped cartouche, is also garlanded with flowers festooned from 'picturesque' scrolls of Roman acanthus. It relates to an overmantel pattern, incorporating a landscape vignette, that was invented by the architect John Crunden (d. 1835) and published in The Chimney-Piece Maker's Daily Assistant, 1766 (pl. 27). Similar interlaced flower garlands feature on several mirror patterns of circa 1755-1760 by John Linnell (H. Hayward and P. Kirkham, William and John Linnell, London, 1980, figs. 187-190).
An almost identical overmantel mirror was sold anonymously, Christie's London, 23 November 2006, lot 61 (£60,000 including premium).