LONDON.- Rare and important works by two Flemish old masters, Sir Anthony van Dyck and Sir Peter Paul Rubens, will form the cornerstone of this year’s December Evening Sale of Old Master & British Paintings at Sotheby’s in London. The sale, which is scheduled to take place on the evening of Wednesday, December 9, 2009, will also include prime examples by the prominent British masters, Sir Edwin Landseer and Samuel Scott. As previously announced, an outstanding self portrait by Sir Anthony van Dyck (1599-1641) – one of the most important Continental European artists to have worked