Later, Jeffery was moved to Ostrzeszów, renamed by Germans to Schildberg, and from there, travelled with other prisoners of war to the camp in Łódź, named Litzmannstadt under occupation.
[2] He was also a member of selective Kedyw groups (patrole), which carried out executions of Nazi collaborators and traitors sentenced by special Underground courts.
Smyslovsky wished to induce the western allies to join a Nazi alliance against the Soviet Union, and was prepared to use Jeffery as a go-between.
He brought with him reports from the Polish underground to the British government: these included details of the Katyn massacre for which at that time (and until 1990) the USSR officially blamed on Germany.
A disillusioned Jeffery later attributed his treatment specifically to the actions of Kim Philby and other high-ranking Russian agents entrenched in the British system.