My grateful thanks are due to Captain Ben Sherman, Commodore of the Polaris Submarine Squadron based on the Holy Loch, and to the officers of the submarine depot ship U.S.S. Simon Lake for their great kindness and hospitality and for the facilities they placed so readily at my disposal. I wish also to thank my good friend, Duncan Anderson, Town Clerk of Dunoon, for all his help, and the Clyde coast for providing, as background to this story, some of the most beautiful scenery in Europe.