Serena Sutcliffe leads Sotheby's International Wine Department, having joined the auction house in 1991. Sotheby's conducts wine auctions around the world; its annual sales totaled $44 million last year. Sutcliffe, 65, is a Master of Wine and is considered one of the world's leading experts on old wines. She and her husband, retired wine merchant and writer David Peppercorn, have been tasting and writing about the great wines of the world for decades. James Suckling met with the outspoken auctioneer in September in Sotheby's offices.