波蘭流亡政府
The attempts to liberate Schorr, which were undertaken by the Polish government-in-exile with the mediation of the Vatican and the United States Department of State did not succeed. In February 1940, Cordell Hull, as Secretary of State during the presidency of Franklin D. Roosevelt, appealed to the Soviet powers through the mediation of international organisations to find Schorr and rescue him from the Soviet prisons. This did not produce any results. The President of the Council of Ministers of the Polish government in exile, Władysław Sikorski, applied to the Minister of Foreign Affairs of his government with the following letter: