DETAILS 394 came from William Dyce's Pegwell Bay, Recollection of October 5th, 1858 (1858-60). The picture is full of Victorian scientific curiosity: the bay was full of fossils; Donati's comet appears (briefly) in the sky. It's in the Tate Gallery.
The first three correct entries came from: G Pettit, Crawley, Sussex; G Hitchon, Watford; and E Wykes, Machynlleth, Powys. Each will receive a bottle of champagne, as will this week's winners. Answers, on a postcard, to arrive by Wed 12 Aug, to: DETAILS 396, Arts Desk, IoS, 1 Canada Square, London E14 5DL.