Final answer:
The Venerable Bede wrote 'The Ecclesiastical History of the English People' around 731, a key historical source for the Anglo-Saxon period and the spread of Christianity in England.
Step-by-step explanation:
The English monk referred to in the question is likely The Venerable Bede, who wrote 'Historia ecclesiastica gentis Anglorum' or 'The Ecclesiastical History of the English People' around 731 in Jarrow, England. This work is considered one of the most important sources for the early history of England, particularly regarding the Anglo-Saxon period. It combines historical narrative and scholarly analysis to describe the conversion of the English to Christianity and the establishment of the church in England. Bede's work has been instrumental in our understanding of early English history, culture, and the spread of Christianity.