Retiring for the summer to his mountain retreat at Berchtesgaden, Hitler did not publicly respond to the Polish answer to him which was given on May 5 in a speech by Colonel Beck to Parliament and in an official government memorandum presented to Germany on that date. The Polish statement and Becks speech constituted a dignified, conciliatory but also firm reply.
It is clear [it said] that negotiations, in which one State formulates demands and the other is obliged to accept those demands unaltered, are not negotiations.
William L. Shirer, The Rise and Fall of the Third Reich
Poland update at #9.