 Christian Schneider and two more contacts in Switzerland were arrested on 19 April 1944.Rudolf Roessler on 19 May 1944.On September 16, 1944, Radó and his wife Helen, the sister of Hermann Scherchen, a German conductor in whose home they had hidden, illegally crossed the Swiss-French border on a French train with the help of the French Maquis from Upper Savoy.