DETAILS 276 came from The Watchdog (painted around 1650), a noble portrait of a Russian wolfhound by the Dutch animalist Paulus Potter. It is hanging in The Hermitage, St Petersburg.
The first three correct entries drawn out of the bag were sent by: Janet Sprinz of Edinburgh; Bill Goodman of Bristol; and Stuart Horsman of Hillsborough, Sheffield.
Each will receive a bottle of champagne, as will this week's winners. Answers on a postcard (to arrive no later than Wednesday 20 March) to: DETAILS 278, Independent on Sunday, 1 Canada Square, Canary Wharf, London E14 5DL.