A pencil, pen and watercolour drawing of the north face of the Ranger's Lodge (now Cumberland Lodge) in Windsor Great Park. In the foreground is the Duke's stud-groom, Barnard Smith, lunging a colt and a string of horses led by grooms at the centre. Unfinished, on three sheets joined vertically. Inscribed on the verso: By T. Sandby £1 11s. 6d.

William Augustus, Duke of Cumberland, was Ranger of Windsor Great Park from 1746, residing at the Ranger's Lodge. Thomas Sandby worked for the Duke on his military campaigns and continued to do so during his period as Ranger. In 1759 he was described as 'Architect to HRH The Duke', and was almost certainly responsible for the remodelling of the north end of the house in the early 1760s. Oppé (catalogue, 1947, no. 101) cites an anonymous writer in 1757 who noted the state of disrepair of the Lodge and that plans to rebuild it were in preparation.  Sandby's plans entailed the demolition of low buildings to the north-east and the addition of a new block facing north to the north end of the Lodge, effectively doubling the house's size. This drawing shows the face of the new north block, which was destroyed by fire in 1869 and only partially rebuilt.

Another version of the drawing, without watercolour but with a figure group that includes the Duke, Thomas Sandby, Sir Thomas Rich and Lord Albemarle is RCIN 914628, and is probably a later draft. Barnard Smith is depicted in 914352, and a hussar also appears in 914350.