Dr Ross Cowan is a British author and historian. He is a specialist in Roman warfare and makes occasional forays into Scottish military history. For more information, and examples of his work, please visit http://independent.academia.edu/RossCowan
Seán Ó'Brógáin lives and works in Donegal, Ireland. He has a BA (Hons) in Scientific and Natural History illustration from Lancaster University and has worked for a wide range of clients. These include Manchester University, An Post, the National Museum of Ireland, the Irish Office of Public Works, as well for a variety media companies, museums, councils, and private individuals.