Turner’s inscription on this drawing, made with the page turned horizontally, is almost illegible; it was transcribed by Finberg as ‘Quathlynn’, interpreted as Llyn Cwellyn.1 Drws y Coed is the pass that runs between Mynydd Mawr and Y Garn, and Turner draws the view looking west towards the coastal plain, with Llyn Nantlle in the distance and the small town of Penegroes beyond. Llyn Cwellyn lies behind Mynydd Mawr, at the head of this defile. See the drawing on folio 64 verso (D02095), which shows Mynydd Mawr and Drws y Coed from above, on the slopes of Snowdon.
There is a separate study of a mountain at the top right.
Finberg 1909, I, p.117.