In 1946-1947, Pătrășcanu was nevertheless a member of the Tătărescu-headed Romanian delegation to the Paris Peace Conference, and, in fact, one of the signatories of the Peace Treaty with Romania. According to Belu Zilber, during this time, he read Arthur Koestler's "Darkness at Noon" (a glimpse into forced confessions alluding to the 1936-1937 Moscow Trials, the book was banned throughout the Eastern Bloc). The attitudes he expressed in Paris were considered nationalist by his Soviet overseers, and he himself complained to Gheorghiu-Dej about the party's suspicion surrounding his diplomatic activities.