Chris Caple is Emeritus Reader in Archaeological Conservation having been director of the Durham University postgraduate programme in artefact conservation 1988–2018. Author of 7 books including the first edition of Conservation Skills: Judgement, Method and Decision Making. He is currently writing up his archaeological excavations at Nevern Castle. Emily Williams is Associate Professor of Archaeological Conservation at Durham University where she directs the MA in the Conservation of Archaeological and Museum Objects. Prior to this she was the Senior Conservator of Archaeological Materials at the Colonial Williamsburg Foundation. She has worked at museums or sites in Australia, Belgium, Bermuda, Egypt, Iraqi Kurdistan, Syria, Tunisia, and Turkey.