This sketch shows the town of Nemi and the northern tip of the lake of the same name as seen from the road leading towards Genzano. On the right-hand side of the landscape is a thicket of pine and cypress trees, a characteristic feature of the Alban hills, see folio 18 (D15327), and possibly the same grove visible in folio 19 (D15329).
Turner has also made a separate study in the bottom left-hand corner of the page which may be a smaller version of the same view. The composition spills over onto the opposite sheet of the double-page spread, see folio 19 verso (D15330).
For a general discussion of Turner’s view of Lake Nemi see folio 19 (D15329).