The de Mans moved to Boston, where Paul earned money teaching conversational French at Berlitz and did translations assisted by Patricia de Man; he also gave private French lessons to Harvard student Henry Kissinger, then running a small center and publication of his own. There, de Man met Harry Levin, the Harvard Professor of Comparative Literature, and "was invited to join an informal literary seminar that met at Levin's house (alongside, e.g., George Steiner and John Simon). By the fall of 1952, he was officially admitted to graduate study in comparative literature." In 1954 someone sent Harvard an anonymous letter denouncing de Man as a wartime collaborator and questioning his immigration status (a letter not surviving, and known only on the basis of de Man's response to it). According to Harvard faculty members, de Man offered a thorough and more than satisfactory account of his immigration status and the nature of his political activities. While he was writing his dissertation, de Man was awarded a prestigious appointment at the Harvard Society of Fellows. In 1960, because his thesis was unsatisfactory to his mentors on several counts, and especially its philosophical approach, they were prepared to dismiss him, but he moved immediately to an advanced position at Cornell University, where he was highly valued.