Made with the page turned horizontally, this study is developed from the monochrome sketch on folio 2 recto (D03995). It probably shows Harlech Castle, and should be read in conjunction with the drawings on the immediately following leaves, which are studies in coloured chalks for another North Wales subject, the composition that became Dolbadern Castle, North Wales, shown at the Royal Academy in 1800 (Royal Academy of Arts, London).1 In the event Turner seems to have made relatively little use of his Harlech studies.
Martin Butlin and Evelyn Joll, The Paintings of J.M.W. Turner, revised ed., New Haven and London 1984, pp.9–10 no.12, pl.7 (colour).
An offset of this drawing is on the verso of folio 121 (D04139; Turner Bequest LXIX 122), indicating that the pages were once bound consecutively.