LONDON.- Sothebys first-ever Evening Sale of Islamic Art, A Princely Collection: Treasures from the Islamic World, tonight realised the remarkable total of £7,070,550, against a pre-sale estimate of £3.4-4.8 million, and established strong sell-through rates by lot and value of 96% and 88% respectively. Of the lots sold, 75% achieved sums in excess of their pre-sale high estimates. Commenting on the results, Edward Gibbs, Senior Director and Head of Sothebys Middle East Department, said: Tonights auction of Islamic Art the first Evening Sale in this collecting category ever to be staged represents a landmark moment for the field. These extraordinary results are confirmation of the discerning eye of the collector who assembled this collection of rare and high quality works of art, and also