It was the belief that the destroyer had sunk one of the U-boats.
My own notion of it is that the U-boats have many of us bluffed.
It was all interesting—the life in Paris—but it had nothing to do with U-boats.
Also he urged the crew to have a special watch out for U-boats.
By this time the lurking U-boats had been dealt with in a most effective way.
Early in the war ...