LONDON.- A powerful painting of a Staffordshire bomb store by the artist David Bomberg will be offered by Bonhams in the 20th Century British Art sale on March 9th. The painting is estimated to sell for £80,000 – 120,000. As World War II broke out in Europe, Bomberg felt a pressing need to contribute in some way and repeatedly suggested that artists be employed to depict and document the historic events. To his satisfaction, in 1939 it was announced that a War Artist’s Advisory Committee (WACC) was set up for exactly this purpose. Following almost four years of inactivity and almost 300 applications for teaching posts, Bomberg’s request to participate in the cause was finally accepted. In 1943, he was sent to Burton on Trent in Staffordshire where he spent two weeks, ninety feet below ground in long disused gypsum mines. Here, almost