Watson's involvement in the America's Cup was long running and manifested itself in four cup challengers; the Thistle for the Scottish syndicate headed by Sir James Bell,Paterson, L., The Auld Mug: The Scots and the America's Cup, 1st edition, Neil Wilson Publishing, Glasgow, 2007. two yachts named Valkyrie for Lord Dunraven, and Shamrock II for Sir Thomas Lipton.
