 He moved back to Oxford to become a University Lecturer in Classics at Oxford University and a Tutorial Fellow of Keble College, Oxford in 1967 and remained there until his retirement in 2007.During a distinguished academic career his research focused mainly on Hellenistic and Roman poetry.He wrote many important articles on the fragmentary poems of Callimachus and published a full length commentary on the "Hecale" in 1990 (second edition 2009, with translation), but also ranged over authors as diverse as Euphorion, Choerilus, Lycophron, Horace, Propertius and Virgil.