Cornell received his Bachelor's Degree in Ancient History, with first class honours, from University College London (1968) and his PhD in History from the University of London (1972). He was a student of Arnaldo Momigliano and wrote a dissertation entitled "Cato's Origines and the non-Roman historical tradition of ancient Italy". He was a fellow at Christ's College, Cambridge (1973-75), Assistant Director of The British School at Rome (1975-77), lecturer and senior lecturer in Ancient History at University College London (1978-88, 1988-95).
'Aeneas and the Twins: the development of the Roman foundation legend' in Proceedings of the Cambridge Philological Society n.s. 21 (1975), 1-32
'Rome and Latium Vetus, 1974-79', Archaeological Reports 26 (1980), 71-89
(With J.F. Matthews) Atlas of the Roman World (Oxford: Phaidon; New York: Facts on File, 1982)
'Rome and Latium Vetus, 1980-85', in Archaeological Reports 32 (1986), 123-33
'Rome and Latium to 390 BC', in The Cambridge Ancient History, 2nd ed., vol. VII.2 (Cambridge: CUP 1989), ch. 6, pp. 243-308; 'The Recovery of......