COMPETITION: DETAILS NO 354

In Which painting by which painter can you find this shadowy figure?

Details 352 came from Andrea del Castagno's The Youthful David (c 1450). The picture has its unusual shape because it is painted on an ornamental leather shield, to be carried in pre-tournament processions. It is in the National Gallery of Art, Washington DC.

The first three correct answers came from Geraldine Saunders of Moordown, Bournemouth; Maurice Rubens of Ipswich, and Pam Bassindale of Clifton, Bristol. Each will, in due course, receive a bottle of champagne, as will this week's winners. Answers, on a postcard (to arrive by Wed 31 Sept), to: DETAILS 354, IoS, 1 Canada Sq, London E14 5DL.