After his escape, he arrived in Vienna, where he was considered a political adventurer and was denied aid. In 1652 he came to Sweden, where he was accepted into the royal Stockholm court of Queen Christina. He was the co-author of an anti-Polish alliance between Sweden, the Cossacks and Transylvania. He then went to Hamburg, where he sustained correspondence with the new King of Sweden Charles Gustav. It was in this city that Radziejowski and Charles Gustav signed a pact where they both agreed to invade Poland if the Sejm demanded Radziejowski to return to be convicted.