Question: This British scholar who attended the oldest English-speaking university in the English speaking world was president of the British academy for what length of time?

full_context: Document 1: University College, Oxford: University College (in full The Master and Fellows of the College of the Great Hall of the University of Oxford, colloquially referred to as "Univ"), is a constituent college of the University of Oxford in England. It has a claim to being the oldest college of the university, having been founded in 1249 by William of Durham.
Document 2: G. C. Peden: George C. Peden is an emeritus professor of history at Stirling University, Scotland. He has written about the British Treasury; Keynesian economics; economic aspects of defence and foreign policy; the welfare state, and some recent Scottish economic history. He was born in Dundee in 1943 and educated at Grove Academy, Broughty Ferry. He worked for eight years as a sub-editor of the Dundee Evening Telegraph before becoming a mature student at Dundee University, graduating MA with first class honours in modern history in 1972. He was a postgraduate at Brasenose College, Oxford, and a research fellow at the Institute of Historical Research, London, and graduated D.Phil from Oxford in 1976, having completed his thesis under the supervision of Professor N.H. Gibbs. He was a temporary lecturer in history, Leeds University, 1976-7; lecturer in economic and social history, and then reader in economic history, Bristol University, 1977–90; and professor of history, Stirling University, 1990-2008. He was a British Academy research reader, 1987-9, and visiting fellow, All Souls College, Oxford, 1988-9, and St Catherine's College, Oxford, 2002. He is a fellow of the Royal Society of Edinburgh. According to the first version of this article, probably written by a student, Peden had a reputation for insisting on high standards of grammar in essays, perhaps reflecting his earlier career as a sub-editor. He lives in Callander, on the edge of the Scottish Highlands, and divides his time between hillwalking and research and writing.
Document 3: Denys Page: Sir Denys Lionel Page, FBA (11 May 1908, Reading, Berkshire – 6 July 1978, Tarset) was a British classical scholar at Oxford and Cambridge universities. He was President of the British Academy from 1971–74.
Document 4: Christ Church, Oxford: Christ Church (Latin: "Ædes Christi" , the temple or house, "ædēs", of Christ, and thus sometimes known as "The House") is a constituent college of the University of Oxford in England. Christ Church is a joint foundation of the college and the Cathedral of the Oxford diocese (Christ Church Cathedral and its Cathedral School), which serves as the college chapel and whose dean is "ex officio" the college head.
Document 5: Regius Professor of Greek (Cambridge): The Regius Professorship of Greek is one of the oldest professorships at the University of Cambridge. The Regius Professor chair was founded by Henry VIII in 1540 with a stipend of £40 per year, subsequently increased in 1848 by a canonry of Ely Cathedral.
Document 6: Colin Mayer: Colin Peter Mayer CBE, FBA is the Peter Moores Professor of Management Studies at the Saïd Business School at the University of Oxford. He was the Peter Moores Dean of the Saïd Business School between 2006 and 2011. He is a Fellow of the British Academy, a Fellow of the European Corporate Governance Institute, a Fellow of the Royal Society of Arts, and a Research Fellow of the Centre for Economic Policy Research. He is a Professorial Fellow of Wadham College, Oxford, an Honorary Fellow of St. Anne's College, Oxford, and an Honorary Fellow of Oriel College, Oxford. He is an Ordinary Member of the Competition Appeal Tribunal and a member of the UK government Natural Capital Committee.
Document 7: Anthony Kenny: Sir Anthony John Patrick Kenny {'1': ", '2': ", '3': ", '4': "} (born 16 March 1931) is an English philosopher whose interests lie in the philosophy of mind, ancient and scholastic philosophy, the philosophy of Wittgenstein and the philosophy of religion. With Peter Geach, he has made a significant contribution to Analytical Thomism, a movement whose aim is to present the thought of St. Thomas Aquinas in the style of modern philosophy of traditional Thomism. He is one of the executors of Wittgenstein's literary estate. He is a former President of the British Academy and the Royal Institute of Philosophy.
Document 8: University of Oxford: The University of Oxford (informally Oxford University or simply Oxford) is a collegiate research university located in Oxford, England. It has no known date of foundation, but there is evidence of teaching as far back as 1096, making it the oldest university in the English-speaking world and the world's second-oldest university in continuous operation. It grew rapidly from 1167 when Henry II banned English students from attending the University of Paris. After disputes between students and Oxford townsfolk in 1209, some academics fled north-east to Cambridge where they established what became the University of Cambridge. The two "ancient universities" are frequently jointly referred to as "Oxbridge".
Document 9: Oxbridge: Oxbridge is a "portmanteau" (composite word) of "Oxford" and "Cambridge", both elite universities in the United Kingdom. The term is used to refer to them collectively, both in contrast to other British universities and more broadly to describe characteristics reminiscent of University of Oxford and University of Cambridge, often with implications of superior social or intellectual status.
Document 10: New College, Oxford: New College is one of the constituent colleges of the University of Oxford in the United Kingdom. Founded in 1379 by William of Wykeham, the full name of the college is The Warden and Scholars of St Mary's College of Winchester in Oxford. The name "New College", however, soon came to be used following its completion in 1386 to distinguish it from the older existing college of St. Mary, now known as Oriel College.
Document 11: Clive Upton: Clive Upton is a professor of English language at the University of Leeds, England, specializing in dialectology and sociolinguistics. He has acted as a consultant on British pronunciation for the English-language dictionaries published by Oxford University Press, including the "Oxford English Dictionary", the "Shorter Oxford English Dictionary", and the "Concise Oxford Dictionary". He was also responsible for the British element of the "Oxford Dictionary of Pronunciation for Current English" (2001).
Document 12: University of Cambridge: The University of Cambridge (informally Cambridge University) is a collegiate public research university in Cambridge, England. Founded in 1209 and granted a royal charter by King Henry III in 1231, Cambridge is the second-oldest university in the English-speaking world and the world's fourth-oldest surviving university. The university grew out of an association of scholars who left the University of Oxford after a dispute with the townspeople. The two medieval universities share many common features and are often referred to jointly as "Oxbridge".
Document 13: Faculty of History, University of Oxford: The Faculty of History at the University of Oxford organises that institution's teaching and research in modern history. Medieval and Modern History has been taught at Oxford for longer than at virtually any other University, and the first Regius Professor of Modern History was appointed in 1724. The Faculty is part of the Humanities Division, and has been based at the former City of Oxford High School for Boys on George Street, Oxford since the summer of 2007, while the department's Library was removed from the former Indian Institute on Catte Street to the main Bodleian buildings at the start of 2013.
Document 14: British Scholar Society: The British Scholar Society is a scholarly society focusing on Britain's role in the world from the seventeenth century to the present. It puts out a bi-annual academic journal published by Edinburgh University Press entitled "Britain and the World: Historical Journal of The British Scholar Society", as well as a "Britain and the World" book series with Palgrave Macmillan. The British Scholar Society also organizes a yearly academic conference, which has been held in both US and UK locations. Launched in 2006, the British Scholar Society is currently chaired by Martin Farr of Newcastle University. The chair of its advisory board is Linda Colley of Princeton University. The British Scholar Society describes its membership as "people from around the world who share a common interest in Britain, its history, and its interactions with the wider world."
Document 15: Oxford College of Emory University: Oxford College of Emory University, also called Oxford College and founded in 1836 as Emory College, is an American two-year residential college specializing in the foundations of liberal arts education. It is the birthplace and one of nine academic divisions of Emory University. The college is located on Emory University's original campus in Oxford, Georgia, 38 mi east of Emory's Atlanta campus. Students who enroll in Oxford College complete an associate of the arts degree there, after which they can continue their studies at Emory's Atlanta campus to pursue a bachelor degree without any additional applications.
ground_truth: from 1971–74