Timothy Insoll Ph.D. (1996), Cambridge University, is Al-Qasimi Professor of African and Islamic Archaeology in the Institute of Arab and Islamic Studies, University of Exeter. He has published extensively on African and Islamic archaeology, including Material Explorations in African Archaeology (OUP, 2015), and has current field projects in Bahrain and Ethiopia. Salman Almahari, Ph.D. (2013), Cairo University is Head of the Archaeological Conservation Department at the Bahrain Authority for Culture and Antiquities. He has published two books, Archaeological Sites in Bahrain: Threats & Challenges, Conservation and Management (Arab Institute for Research and Publishing, 2009), and Conservation of Historic Buildings, Buildings from Muharraq in Bahrain (ICCROM, 2018). Rachel MacLean, Ph.D. (1996), Cambridge University, is an independent researcher who has co-directed projects in northern Ghana and Bahrain and directed projects in Uganda. She co-authored the Archaeological Guide to Bahrain (Archaeopress, 2011), and Temporalising Anthropology, Archaeology in the Talensi Tong Hills (Africa Magna Verlag, 2013).