Another article on this thread discusses the Pact of Steel.
The renewed contacts between Berlin and Moscow did not escape the watchful eyes of the French ambassador in the German capital. As early as May 7, four days after Litvinov's dismissal, M. Coulondre was informing the French Foreign Minister that, according to information given him by a close confidant of the Fuehrer, Germany was seeking an understanding with Russia which would result in, among other things, a fourth partition of Poland. Two days later the French ambassador got off another telegram to Paris telling of new rumors in Berlin "that Germany had made, or was going to make, to Russia proposals aimed at a partition of Poland."
William L. Shirer, The Rise and Fall of the Third Reich
Ping. More info at #2