Mark Driessen graduated at Wageningen University (tropical forestry and agriculture) and worked for many years in Africa and South America. After returning to The Netherlands he started working as a field archaeologist and studied Provincial Roman Archaeology at the University of Amsterdam and obtained his PhD on the topography, settlement continuity and monumentality of Roman Nijmegen at the same university. He excavated and worked on the Roman harbour of Voorburg-Arentsburg (Forum Hadriani). Since 2011 he is Assistant Professor in Provincial Roman Archaeology at Leiden University. In a joint venture operation with the al-Hussein bin Talal University (Petra-Jordan) Mark Driessen and Fawzi Abudanah are the directors of the Udhruh Archaeological Project, and together with David Breeze of the Qasr Bshir Conservation Project (both in Jordan). Carol van Driel-Murray (1950) obtained her PhD in 1987 at the University of Amsterdam on the subject of Roman Leatherwork. She taught the Archaeology of the Roman Provinces at University of Amsterdam till 2012, and at the Faculty of Archaeology at Leiden University till her retirement in 2015. She has published extensively on Roman military leatherwork, Roman and medieval footwear. Her research interests include gender in material culture, military communities and military equipment. She participated in various excavations in Syria, and has been involved with the Jebel Aruda campaigns and publication from its inception.