View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
This sketch shows a deep valley with craggy, wooded hills. In the distance on the right are a classical portico, a high bridge or aqueduct, and a town or ruins on the skyline – all elements familiar elements in the repertoire of Turner’s classical landscape paintings. In the foreground are several animated figures around what seems to be a low, arched structure, but the subject is as yet unidentified. There are several sketches of this kind between folios 1 verso (D17774), under which the sequence is discussed, and 7 verso (D17782).