<blockquote>A friend of mine was stationed at the U.S. Naval Submarine Base in New London Connecticut the same time that the Surcouf was there. A U-boat was sunk off the New England coast by Destroyers and some of the flotsom that came to the surface was loaves of bread still in their wrappers from a bakery in New London. The Navy figured that the Surcouf had to be supplying the u-boats with food. Also she would go to sea with a full load of torpedoes for training purposes and come back having expended a number of them. The Navy also figured she was sinking our ships as well as supplying the u-boats. According to him one of our submarines followed her out to sea and when they found her setting up to torpedo one of our ships, the U.S. Submarine torpedoed her. End of Story. Naturally nothing could be said about this because it would have upset the Free French, so everything was hushed up. I don't know what U.S. Sub it was that sank her.</blockquote>
via <a href="http://www.ahoy.tk-jk.net/macslog/FrenchSubmarineSurcoufthe.html">Ahoy - Mac's Web Log - French Submarine Surcouf, the World's largest Submarine before WW2. Her mysterious disappearance in February of 1942.</a>.