The view is to the south-east from the vicinity of the Upperton Monument folly in Petworth Park.1 Petworth House is barely indicated about a mile and a half away in the distance to the left of centre. There is a similar view with a little more detail on folio 20 recto opposite (D18741); Finberg took the two pages to form a continuous panorama.2
The sequence of sketches between folio 17 verso (D18736) and (apparently) folio 26 recto (D18753), and possibly 26 verso (D18754), comprises Sussex subjects in the vicinity of Petworth, those as far as folio 22 verso (D18746) showing the park west of the house. For a note on Lord Egremont, Petworth, and Turner’s work there, see the sketchbook’s Introduction.
The subject was identified as ‘Petworth Park’ in undated MS notes by A.J. Finberg (died 1939) and C.F. Bell (died 1966) in their respective copies of Finberg 1909, Tate Britain Prints and Drawings Room, vol.II, p.649; see also Ian Warrell in Butlin, Luther and Warrell 1989, p.131.
Finberg 1909, II, p.649.