The recognition and development of the art of chasing in England in the eighteenth century owed much to the skill and influence of Swiss, German and French immigrants. The most accomplished of these was George Michel Moser (1706-1783), one of only two chasers described and praised by George Vertue (1684-1756). The note-books of Vertue, a writer, antiquary and an engraver of considerable repute, are the major source of information on artistic life in England in the first half of the eighteenth century.Ishmail Parbury (died 1746) was the second chaser praised by Vertue, who describes this particular plaque as a 'masterpiece'. Parbury is still regarded today as one of the finest chasers of the time. It is rare to find contemporary references to chasing (the working of metal in relief from the front), and even more remarkable that the two pieces referred to by Vertue survive today: this plaque, and a gold box by Moser in the Metropolitan Museum of Art, New York.The scene on this plaque depicts the marriage of Alexander the Great and Roxanna, the daughter of a defeated King. It is based on a tapestry cartoon of 1684-6 by Antoine Coypel (1661-1722): Parbury was probably working from a print.