The Art of Sketching from Nature
Reference: Delamotte, 1871
Philip Henry Delamotte, The Art of Sketching from Nature, London, 1871
Plate 19, 'Llanberis by Girtin' is discussed in some depth (pp.63–4). The view of the bridge at Llanberis has not been traced, but judging from the image it is unlikely to be by Girtin.