The Long Way Round: The Story of the California Clipper
lapsedhistorian.com
lapsedhistorian.com
They apparently had a very distinctive sound to their engines, something that my grandpa likes to reminisce about.
Although the "source" is the Daily Mail (I apologise) the content itself is quite interesting, concerning the location and partial raising of one of the Sunderlands that was ditched during the war, amazingly the location directed by a member of that very air crew: http://www.dailymail.co.uk/news/article-2523196/WWII-Sunderl...