LONDON.- Sotheby’s Seventeenth Annual Irish Sale in London, to take place on Tuesday, 29 March, 2011, brings together exceptional masterpieces by eminent Irish artists. The group of works, many never before offered on the market, boasts superb and rare pictures by John Lavery, Roderic O’Conor and Mary Swanzy. Louis le Brocquy is represented with thirteen works that span his career, and a selection by today’s most sought after Irish artists, including Basil Blackshaw, John Shinnors, William Scott, Colin Middleton and Sean Scully, complete a sale that draws attention to the richness of Ireland’s longstanding artistic output. John Lavery’s portrait of Lady Gwendoline Churchill, A Lady in Brown, comes to auction for the first time in its history, from a private collection in the UK. Passed down through the generations following its purchase in 1921, the painting was probably executed during the summer of 1915.