There are no illustrations available in the digital version of this thesis. They are available in the printed version held in the Library. Publications arising from this research: : ‘Mortifying the Mind: Asceticism, Mysticism and Oxford, Bodleian Library, MS Douce 114’, in The Medieval Mystical Tradition in England: Exeter Symposium VIII, ed. E. A. Jones (Boydell & Brewer, 2013).