A watercolour drawing of a view of the north front of Windsor Castle, seen from Isherwood's Brewhouse on Datchet Lane. A courtyard of wood and brick stables and outbuildings. In the foreground, horses and carts with barrels, a man with a wheelbarrow and a woman with a bucket being followed by a dog. Smoke is billowing from a chimney on the left. Mounted on a yellow and grey wash lined border of a type associated with works acquired at the Paul Sandby estate sale in 1811. The mount is lettered in pencil, 'Windsor Castle. From a Brewhouse Yard in Datchet Lane'. A date of 1770 is added in a later hand, and at the lower right corner 'By Sandby' has been added in a hand associated with the London dealer Colnaghi. On the verso, a label from the International Exhibition, 1862, no. 1203.

There are two bodycolour versions of the same subject in the Royal Collection (RCINs 914596 and 452667). Another version was at Christie's, London, 17 November 2005, lot 46. A pencil drawing of the same subject is in the Staatliche Museen Greiz (E 505), and an etching was published by Sandby in 1780 (for example, British Museum 1904,0819.599). Another related drawing is in the British Museum (1904,0819.89).

The brewhouse in Datchet Lane was owned by the Isherwood family for much of the eighteenth century. The site was still in use as a brewery at the start of the twentieth century. The stables in the middle ground were replaced in 1799 by Travers' College; these buildings are now used by St George's School.