Context:

Referenced as a six-volume history of the Norman Conquest, described as 'not just the best, but more importantly, the longest history of the Norman Conquest,' published to mark the 800th anniversary. The episode opens with a quote from this work about Harold's fall and the overthrow of 'Teutonic England.'

Context:

Described as 'the Regist Professor of Oxford in the 19th century, who wrote a six volume history of the Norman conquest.' Quoted as saying Harold's trip to Normandy is 'one of the most perplexing questions in all history.'