View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
As Diana Cook and Dorothy Kirk point out,1 there is a more detailed sketch from a similar viewpoint on folio 143 recto (D09660). Looking north from or near Colley Cliff on the Calstock to Gunnislake road, the Tamar at Weir Head (the limit of the tidal river) and the short, straight canal by-passing it, are lightly indicated on the right, with Gunnislake in the distance; the scene is now obscured by trees in the foreground.
For other views along the Tamar Valley, see under folio 114 verso (D09606).
Cook and Kirk 2001, p.40.