sides of the Curzon Line. At the meeting, the German and Soviet officials reached a mutual agreement about the fate of Polish infantry soldiers captured by the Red Army. On 28 September 1939, the German–Soviet Boundary and Friendship Treaty was signed with a Secret Supplementary Protocol #2 where parties agreed upon suppression of Polish resistance: Between 24 October and 23 November 1939, a total of 42,492 Polish prisoners of war were transferred from Kozelsk and Putyvl camps across the Nazi–Soviet demarcation line and handed over to the Germans. Both Gestapo and NKVD expected the emergence of Polish resistance and discussed ways of dealing with the clandestine activities of the Poles. In the immediate aftermath of the meeting, the Soviet NKVD began the collection of data leading to the Katyn massacre committed in the spring of 1940. Conferences The next meeting took place some time at the end of November 1939 in Przemyśl, shared by the German and the Soviet occupational forces between September 1939 and June 1941. Apart from talks of fighting Polish resistance, the Soviets and the Germans discussed ways of exchanging Polish prisoners of war. Also, the first discussions about the occupation of Poland were started. Some historians claim this meeting took place in Lwów. It is also claimed a meeting was held in December. Kraków–Zakopane The best known conference took place in Zakopane, in the villa "Pan Tadeusz", located at the Droga do Białego street close to the Dolina Białego valley. The German side was represented by Adolf Eichmann. The Soviet delegation was headed by Grigoriy Litvinov. According to several sources, one of the results of this conference was the German Ausserordentliche Befriedungsaktion (see: German AB Action operation in Poland), elimination of Krakow intelligentsia Sonderaktion Krakau and the Soviet Katyn massacre In his 1991 book Stalin: Breaker of Nations, British historian Robert Conquest stated: "Terminal horror suffered by so many millions of innocent Jewish, Slavic, and other European peoples as a result of this meeting of evil minds is an indelible stain on the history and integrity of Western civilization, with all of its humanitarian pretensions". Also, Professor George Watson of Cambridge University concluded in his "Rehearsal for the Holocaust?" commentary (June 1981) that the fate of the interned Polish officers may have been decided at this conference. This is however disputed by other historians, who point out that there is no documentary evidence confirming any cooperation