Made with the page turned horizontally, this study seems to be related to the watercolour View of the Gothic Abbey (afternoon) now building at Fonthill, the seat of William Beckford Esq. that Turner showed with his other Fonthill watercolours at the Royal Academy in 1800 (private collection).1
Andrew Wilton, J.M.W. Turner: His Life and Work, Fribourg 1979, p.338 no.335, reproduced; see also ibid., nos.336–339, reproduced, and pl.53.
There are smears of grey and grey-blue colour along the bottom edge, and of yellow along the right edge. For a proposed sequence for the leaves of the disbound Fonthill sketchbook, with this page as folio 10, see the Introduction.