Context:

This is the main book being discussed in the episode. Tom mentions he read it in manuscript last year and describes it as 'learned, judicious, and rich in entertaining detail.' The book covers the occult use that rulers in Britain have made throughout history.

Context:

Referenced when Francis Young explains the origins of the Merlin character, specifically Merlin Ambrosius, describing it as 'a sort of early medieval Welsh narrative' that contains the story of Ambrosius and King Vortigern's castle being undermined by two dragons.

Context:

Biblical book referenced when discussing how royalists portrayed Cromwell, with the quote 'rebellion is the sin of witchcraft, as it says in the first book of Samuel' being used to explain how betraying the king was compared to witchcraft.