Conference papers and public lectures
- 2007 ‘Those lines and circles: geometry and proportion in Leonardo, Dürer and Talpino’. International symposium, Dürer, Italy and Europe, Biblioteca Hertziana, Rome (org. S. Ebert-Schifferer and K. Herrmann-Fiore).
- 2006 ‘The ‘official’ Life of Leonardo: Raphael Trichet Du Fresne’s biography in the Trattato della pittura. Symposium, The Lives of Leonardo, Warburg Institute, London (org. R. Palmer).
- 2005 ‘New evidence of 17thC editorial procedures and responses to Leonardo’s Trattato’. International workshop, Leonardo da Vinci’s Treatise on painting, University of Virginia, Department of the History of Art and Institute for Advanced Technology in the Humanities (org. F. Fiorani).
- 2001 ‘What might Leonardo’s own Trattato have looked like? And what did it actually look like up to the time of the editio princeps?’ (with M. Kemp). International colloquium, ‘The fortuna of Leonardo’s Trattato della pittura’, Warburg Institute, London (org. C. Farago and T. Frangenberg).
- 2001 ‘Poussin’s poses: replication and the antique in the illustrations to Leonardo’s Trattato’. International colloquium, Templates, moulds and stencils, Institut Koyré, Paris (org. J. Pfeiffer and K. Chemla).
- Forthcoming, ‘Leonardo’s ben finiti cartoons and working methods’. Arts Pursuits UK, London (12 November 2011).
- 2010 ‘Inventing, mixing and matching: the making and use of Leonardo’s drawings’. Birkbeck College, London.
- 2008 ‘Leonardo and his workshop: new evidence of working methods’. Department of the History of Art, Oxford University.
- 2007 ‘Leonardo and his circle: drawings in British collections’. Leonardo da Vinci Society Annual Lecture, Courtauld Institute, London.
- 2006 ‘Leonardo’s cartoons, workshop methods and ‘jigsaw’ compositions’. Ashmolean Museum, Oxford.
- 2006 ‘The painter’s power of creation: Leonardo’s drawings and paintings’. Christ Church College, Oxford.
- 2005 ‘Leonardo on women: theory and practice’. St John’s College, Oxford University.
- 2002 ‘Leonardo’s views of nature’. Department of the History of Art, Oxford University.