Competition: Details No 391

IN WHICH painting by which painter can you find this swirl?

DETAILS 389 came from Caspar David Friedrich's romantic classic, Monk by the Sea (1809-10). It's one of those pictures that "seems to anticipate" abstract art. It's in the Schloss Charlottenburg, Berlin.

The first three correct entries drawn from the hat were sent by: Linda Walsh of Hoylandswaine, Sheffield; Peter Roebuck of Whalley Range, Manchester; and Michael Baldry of Ipswich, Suffolk.

Each will, in due course, receive a bottle of champagne, as will the winners of this week's competition. Answers, on a postcard to arrive by Wednesday 1 July, please, to: DETAILS 391, Arts Desk, Independent on Sunday, 1 Canada Square, London E14 5DL.