 After his discharge from the army, Danaher resumed his studies, being awarded his MA from the National University of Ireland in 1946.In early 1940 he once again worked for the Irish Folklore Commission, first as a field worker and then as the Commission's official ethnographer, collecting, cataloguing and illustrating large amounts of traditional tales and folklore, primarily from his home county of Limerick.Some of his sources were family members, such as his father, Liam.