View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
This rather scrappy and rapidly executed sketch shows a ridge with fortifications atop it and possibly a bridge or bridge of boats to its left. This sketch is part of a short series of jottings which are all of a piece in terms of handling and subject matter (see Tate D19876–D19879, D19882; Turner Bequest CCXVI 161–162a, 165). Cecilia Powell believes these sketches to have been taken as Turner made his way by canal boat from Ghent through Bruges to Ostend.1 The topography and form of the fortification, however, do not appear Flemish to this cataloguer; rather, they appear reminiscent of the fortress of Ehrenbreitstein at Koblenz, a citadel overlooking the confluence of the Moselle and Rhine Rivers in Germany.
Powell 1991, p.43 note 32 [p.60]