View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
With the page turned vertically, there are three studies apparently showing the same lighthouse. The details suggest the one at Le Hourdel, Picardy, on the west side of the Somme Estuary where it meets the Channel north-east of Le Tréport (see folio 55 recto; D35583). Compare folio 61 verso (D35595), and see the sketchbook’s Introduction for other identified subjects along this coast.
There is some brown staining at the gutter, possibly indicating water damage in the 1928 Tate flood.