E.T. Cook and Alexander Wedderburn eds., Library Edition: The Works of John Ruskin: Volume XIII: Turner: The Harbours of England; Catalogues and Notes, London 1904, p.626 no.363, as ‘Tours’.
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.II, p.1198, CCCLXIV 294, as ‘Tours. Exhibited Drawings, No.363, N.G.’, after c.1830.
John Eveleigh, 10th Anniversary Exhibition 1961–1971: Turner: Major Loan Collection: Theme – Water: Lakes, Streams, Rivers & Seas: Late Watercolours by Courtesy of the Trustees of the British Museum: Also Other Artists Sharing a Common Theme, exhibition catalogue, Arts Centre, Folkestone 1971, p. no.27, as ‘Tours’.
Andrew Wilton in Martin Butlin, Wilton and John Gage, Turner 1775–1851, exhibition catalogue, Royal Academy, London 1974, p.157 under no.559.
Cecilia Powell, Turner in Germany, exhibition catalogue, Tate Gallery, London 1995, pp.70, 81 note 2, 145 under no.67, 166 no.95, as ‘Regensburg from across the Danube’, 1840, reproduced in colour, p.169 under no.98.