The identification of this subject has been confirmed by Ian Warrell. Turner presumably made the study when he was in Wiltshire in 1795 for Sir Richard Colt Hoare (1758–1838); see Tate D00675 (Turner Bequest XXVII N). Harnham Mill was a little later to be drawn on several occasions by John Constable (1776–1837).
Partly finished in watercolour, the subject is surrounded by ruled pencil lines approximately 4–6 mm inside the edge of the sheet.
Blank; not stamped.