With the sketchbook turned horizontally, Turner filled this page with a drawing taken from within the ruined castle at Gisors, located some twenty-five miles east of the Seine as it flows past Les Andelys. Viewed from the tall Tour du Prisonnier at the eastern end of the fortifications, the scene is dominated on the left by the Tour du Gouverneur, to which it is connected by a rampart, and on the right by the tall donjon on its high mound.
Gisors and its ruined stronghold were the subject of particular study in this sketchbook. For a list of associated sketches in the volume, see the entry for folio 41 verso (D23962; Turner Bequest CCLIV 41a). For a slightly later watercolour study of the town’s landmarks in the Turner Bequest, see Tate D20265 (Turner Bequest CCXXII F).