At the beginning of the war, the communist parties in Europe needed to continue communications with parties in the Soviet Union, for example the
Communist International (Comintern) and in this respect the PCF was no different. In 1938, Pauriol was evaluated twice by the executive committee of the PCF to prove his electrical engineering and radio telegraphist skills were up to par. In April 1942, Pauriol constructed a radio transmitter that was used by Hersch and Miriam Sokol to provide a link to London for Trepper to transmit intelligence from an apartment in
Maisons-Laffitte. The cipher clerk was Vera Ackermann. At the time this was only link between the Rote Kapelle in France and the Soviet Union. who informed him that she had first been visited by
Abraham Rajchmann and then later
Hillel Katz. On both occasions, she had pretended she did not know them. The meeting with Moussier had been arranged by Gestapo officer
Karl Giering of the
Sonderkommando Rote Kapelle and was part of a German
Funkspiel operation. Trepper was in custody of the
Sonderkommando Rote Kapelle. Ostensibly the operation was to prove to Soviet intelligence that he was still free and enable the Funkspiel operation to continue, otherwise he would likely have been executed but in reality it was an operation by Trepper to pass a message to the PCF that confirmed the espionage network had collapsed. Trepper had instructed Moussier not to recognise anybody from the Trepper network except himself. In early June 1943, Trepper met Moussier and passed a message from Giering, supposedly from Trepper to inform Soviet Intelligence that the French Rote Kapelle was still functioning, as well his own report and a letter instructing Duclos to send the report to Soviet intelligence as soon as possible. After the meeting, Moussier went into hiding. During the summer Pauriol visited Moussier and her husband Milo in Beugne l'Abbe, west of
Luçon and arranged for the couple to disappear. On 7 July 1943 the first part of the message was transmitted to Soviet intelligence by
Jacques Duclos. The second part followed on 10 July. ==Arrest==