A watercolour drawing showing the North front of the Castle, with a proposed design for a Picture Gallery added to the west end of the North Terrace, marked A in pencil. A long wall runs across the centreground, with a white cottage with red roof at the far right. The portion at the lower left corner is unfinished with traces of pencil. 

The flatness of the outlines and the long thin sheet of paper mean that this drawing and RCIN 914590 (showing the same view before the proposed additions) should be compared with RCIN 914602, a sheet that Sandby made using a camera obscura. Another drawing (RCIN 914591) shows a design for the Picture Gallery alone. The design was never carried out. Canaletto painted a view of Windsor Castle from this viewpoint in 1747.