Although this is a fictional story it is based on some truth. In 1398 a Knight Templar and Master mason Sir Guillaume de La Croix accompanies Prince Henry St Clair and his Captain of the fleet Antonio Zen together with a flotilla of ships on a journey across the Western Sea in search of new lands. Now in his old age he is given the task carving some of the tracery for the new Roslin Chapel being built by the Prince. Whilst engaged on the project he decides to create a window which he calls 'The Merica Portal' as a memorial to Prince Henry and those who took that epic journey and decides to set down a journal showing his lineage and the part he played in this great venture.