10 Downing Street,
 
      Whitehall
 
      4th October, 1939.
 
      My dear Mr. Roosevelt;
 
      Your letter of the 11th of last month has just reached me and 
      I am very grateful to you for your sympathetic and encouraging 
      words.
 
      These are indeed difficult days and there are many more before 
      us, but I retain full confidence that we shall come out successfully 
      in the end.
 
      My own belief is that we shall win, not by a complete and spectacular 
      military victory, which is unlikely under modern conditions, 
      but by convincing the Germans that they cannot win. Once they 
      have arrived at that conclusion, I do not believe they can stand 
      our relentless pressure, for they have not started this war with 
      the enthusiasm or the confidence of 1914.
 
      I…