Derek Welsby completed a PhD on Roman military archaeology, going on to spend most of his career excavating along the Nile and in the deserts of Central and Northern Sudan. For much of that time he was an assistant keeper based in what is now the Department of Egypt and Sudan at the British Museum. He has excavated on Roman sites in the UK, Turkey and Libya and has travelled extensively throughout the Empire.Nick Hodgson holds a BA degree from Oxford and PhD from Newcastle. He was formerly Principal Keeper of Archaeology, Tyne & Wear Museums (now Northeast Museums). He has excavated and published widely on Hadrian’s Wall and is currently preparing the results of the long-running excavations at South Shields Roman fort, at the eastern end of the Wall, for publication.