This is a biography of St Cedd, a seventh-century Celtic monk who according to Bede began his ministry on the island of Lindisfarne. He later became the bishop of the East Saxons and founded a monastery at Lastingham. He has largely been overshadowed by his brother Chad, but research into the places he visited reveals more about this well-travelled and dedicated monk. Illustrations and photographs are included to assist the reader locate unfamiliar places, along with dynastic charts, a glossary and bibliography. The text begins with a search for his origins, then investigates nineteenth-century suggestions that he was involved with ministry in Scotland. Further examination is made of the places where Cedd had his mission: Essex, North Yorkshire and Northumbria. This book aims to discover more about Cedd, to challenge some of the assumptions made about his life, to correct dating errors and to stimulate more research into the seventh-century.