Derrick N. Riley was a pilot in the Royal Air Force. During periods of duty as a flying instructor he observed numerous archaeological sites, some of which he was able to photograph and publish. An honorary lecturer in the Departments of Prehistory and Archaeology and of Ancient History and Classical Archaeology at Sheffield University, he was given the degree of Doctor of Philosophy, honoris causa.Derrick Riley died in 1993 and this new edition has been revised, and expanded with a new chapter on recent developments, by Dr Robert H. Brewley, of the Royal Commission on the Historical Monuments of History.

Derrick N. Riley was a pilot in the Royal Air Force. During periods of duty as a flying instructor he observed numerous archaeological sites, some of which he was able to photograph and publish. An honorary lecturer in the Departments of Prehistory and Archaeology and of Ancient History and Classical Archaeology at Sheffield University, he was given the degree of Doctor of Philosophy, honoris causa.Derrick Riley died in 1993 and this new edition has been revised, and expanded with a new chapter on recent developments, by Dr Robert H. Brewley, of the Royal Commission on the Historical Monuments of History.

Derrick N. Riley was a pilot in the Royal Air Force. During periods of duty as a flying instructor he observed numerous archaeological sites, some of which he was able to photograph and publish. An honorary lecturer in the Departments of Prehistory and Archaeology and of Ancient History and Classical Archaeology at Sheffield University, he was given the degree of Doctor of Philosophy, honoris causa.Derrick Riley died in 1993 and this new edition has been revised, and expanded with a new chapter on recent developments, by Dr Robert H. Brewley, of the Royal Commission on the Historical Monuments of History.