Morier was a Swiss military and sporting painter who started working for William Augustus, Duke of Cumberland (1721-65) in 1747, when he painted a series of pictures of troops under his command. From 1752 until 1764 he was employed as ‘limner’ (painter) to the Duke on an annual salary of £100; his name also appears regularly in royal accounts from 1764 to 1767. The six horses (greys) to the left are drawing the 'Great Kettledrums of the Ordnance', played by the Kettledrummer and accompanied by the trumpeters, all in the King's livery. Kettledrums (whether made or captured) were kept to the Tower of London from whence they were borrowed by Handel for his oratorio 'Saul' in 1739. In the middle distance there appears an encampment with artillery. The three mounted officers in the centre cannot be identified nor can the city in the background, though it may be London. The scene has been identified as the camp at Byfleet set up in July to October 1756.