To ensure a timely renewal of the truce, Richelieu sent Claude de Mesmes to Poland as a mediator. The French delegation left Paris on 11 July 1634. Claude de Mesmes was accompanied among others by his secretary , who kept a diary. Avoiding war-torn Germany, the delegation travelled via Denmark and Sweden. On the way Claude de Mesmes stopped in Copenhagen in 1634 to represent France at the wedding of crown prince Christian with Magdalene Sibylle of Saxony. While in Copenhagen they received the news of the Swedish defeat at Nördlingen on 27 August (old style), which further weakened Sweden's position. From Denmark the delegation travelled to Sweden where they passed the winter and met officials in Stockholm. They arrived in Dantzig (now Gdańsk) on 17 May 1635 and proceeded to Marienburg (now Malbork) where they took up quarters in the castle.