It is claimed that, more than 90 years before Columbus, Prince Henry St Clair of Orkney reached North America with a Venetian captain and 300 colonists. Based on new archaeological evidence, this book sets out to confirm Prince Henry's voyage, and details the role played by the outlawed Order of the Knights Templar, shown here to be the antecedents of the Freemasons. The book is both a revision of the history of the discovery of America, and an account of the origins of the Masons. Some of the Templars carried their treasure to the St Clair castle where the knights' relics are still buried. The tomb of their St Clair Grand Master, with the Grail carved on its stone, lies in Rosslyn, the core chapel of the Masonic movement. Other books by Andrew Sinclair include "The Breaking of Bumbo", "Gog" and "King Ludd".