LONDON (Reuters) - A slice of toast left over from the breakfast table of Britain's Prince Charles on his wedding day to the late Princess Diana sold at auction for 230 pounds ($361) on Thursday. The humble scrap was kept by a former servant of the palace as a memento of the 1981 wedding, which was watched by 750 million people worldwide. Rosemarie Smith, whose daughter worked for the royal family for nearly three decades, described how the bread, which was kept on her shelf in a cup, came to be in her possession after a visit to the palace on the day. "At the time my daughter was a maid at the palace and one of her duties was to collect Prince Charles' breakfast tray from outside his room," she said in a press statement. "I was with her in the corridor and saw that Prince Charles had left some toast on the tray. I had been thinking about a keepsake from the wedding and saw the toast and thought to myself: 'Why not'?"