In the following two years he moved to Paris, where he was a graduate assistant at the École Normale Supérieure, allowing him to renew contact with Samuel Beckett, whose lectures he had attended at Trinity, and to meet James Joyce who had been a contemporary and friend of his father at University College Dublin. It was around this time that he began his doctoral studies studying the work of l'Abbaye de Créteil, which he later converted into a thesis on the work of ‘Jules Romains, the Apostle of Unanimisme’, for which he was awarded a PhD at Trinity in 1935.