1909
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.II, p.925, as ‘Do.’ i.e. ‘Ditto’, ‘Ruined castle on hill’.
1980
Agnes von der Borch and Gerhard Bott, J.M. William Turner: Köln und der Rhein: Aquarelle Zeichnungen Skizzenbücher Stiche, exhibition catalogue, Wallraf-Richartz-Museum, Cologne 1980, p.87.
1991
Cecilia Powell, Turner’s Rivers of Europe: The Rhine, Meuse and Mosel, exhibition catalogue, Tate Gallery, London 1991, p.53 note 32.
1995
Cecilia Powell, Turner in Germany, exhibition catalogue, Tate Gallery, London 1995, p.63 note 15 [p.81].