An extremely rare medieval chess piece, one of the five missing Lewis Chessmen, has been sold at a Sotheby’s auction to an anonymous buyer for £735,000. The 900 year-old Lewis Chessmen hoard was discovered on the Isle of Lewis in 1831 and includes some 93 pieces, most of which are now to be found in the British Museum. The newly re-discovered piece, found in a drawer in an Edinburgh home, is a warder (the medieval...