[3] She earned her PhD from the Courtauld Institute of Art, then a constituent College of the University of London,[3] before working as an Inspector of Ancient Monuments for English Heritage.
[5] In 2003, Geddes published the electronic version of the St Albans Psalter,[6] in a project funded with a major grant from the UK Arts and Humanities Research Board (now Arts and Humanities Research Council).
[7] Geddes analysed the images and text of the Psalter to argue that the book was made for the medieval anchoress and prioress Christina of Markyate.
[8] Diane Watt said of the St Albans Psalter project that ‘This electronic publication marked a significant moment in scholarship on women’s literary culture in post-Conquest England’.
[9] In a review of the printed version of Geddes's project for the Studies in Iconography journal, Patricia Stirnemann wrote that 'the book is something of a new genre.