After the possibility of transferring his habilitation to the University of Vienna came to nothing, Adorno considered relocating to Britain upon his father's suggestion. With the help of the Academic Assistance Council, Adorno registered as an advanced student at Merton College, Oxford, in June 1934. During the next four years at Oxford, Adorno made repeated trips to Germany to see both his parents and Gretel, who was still working in Berlin. Under the direction of Gilbert Ryle, Adorno worked on a dialectical critique of Husserl's epistemology. By this time, the Institute for Social Research had relocated to New York City and begun making overtures to Adorno. After months of strained relations, Horkheimer and Adorno reestablished their essential theoretical alliance during meetings in Paris. Adorno continued writing on music, publishing "The Form of the Phonograph Record" and "Crisis of Music Criticism" with the Viennese musical journal "23", "On Jazz" in the Institute's "Zeitschrift", "Farewell to Jazz" in "Europäische Revue". But Adorno's attempts to break out of the sociology of music were twice thwarted: neither the study of Mannheim he had been working on for years nor extracts from his study of Husserl were accepted by the "Zeitschrift". Impressed by Horkheimer's book of aphorisms, "Dawn and Decline", Adorno began working on his own book of aphorisms, what later became "Minima Moralia". While at Oxford, Adorno suffered two great losses: his Aunt Agathe died in June 1935, and Berg died in December of the same year. To the end of his life, Adorno never abandoned the hope of completing Berg's unfinished opera Lulu.