Here Turner looks up towards a distant cluster of buildings, recording the craggy cascade of cliffs that they sit upon, which according to Finberg are possibly the East Cliffs of Folkestone.1 The perspective suggests that his viewpoint was either the shoreline or a boat cast off from East Wear bay.
Towards the outside edge of the page are two further sketches of the cliffs composed from greater distance and with the page turned vertically, supporting conjecture that Turner was jotting down his observations from a boat in the Channel. Drawings of this outcrop as the artist moves past it appear to continue on folio 4 verso (D17213). For a comprehensive list of the pages in the current sketchbook which observe scenes at Folkestone, see the entry for folio 17 verso (D17235).
Finberg 1909, I, p.604.