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See notes to folio 78 verso of the sketchbook (D10549; Turner Bequest CXL 70a) for a run of sketches associated by Eric Shanes with Turner’s watercolour Richmond Terrace, Surrey (Walker Art Gallery, Liverpool) )1 engraved by J.T. Willmore in 1836 for Picturesque Views in England and Wales, but surely earlier and related to other Richmond subjects as well. Here, the Thames runs left of centre and on the horizon at upper left Turner notes St Anne’s Hill, Windsor. Andrew Wilton speculates that if not painted direct from nature, the watercolour study (Tate D17192; Turner Bequest CXCVII B) might be based on this drawing.
Andrew Wilton, The Life and Work of J.M.W. Turner, Fribourg 1979, p.403 no.879.