Julian Brooks, Senior Curator of Drawings at the J. Paul Getty Museum, Los Angeles

Chiara Betti of The Society of Antiquaries of London

Dr. Giovanni Sassu, Director of the Civica Pinacoteca "il Guercino", Cento

The recordings of the Tracing Time events programme are now online and can be viewed in full on Youtube.

Sarah Farkas, Associate Curator of Art at the Crocker Art Museum

Gode Krämer, former head of the Graphic Art Collection and the Picture Gallery of the Kunstsammlungen & Museen Augsburg

Artists Nicholas C. Williams, Joana Galego, and Pippa Young

Nigel Ip, Print Quarterly

Sonia del Re, Senior Curator of Prints and Drawings, National Gallery of Canada, Ottawa