This is CBSI on the world.

I'm John Batchel with Professor Claire Jackson of Cambridge University.

Her new book is The Mirror of Great Britain.

And we should slow down just a moment because this is a life of James I learned from the professor.

Is it a gem?

And I'm presuming the gem is still with us.

Is that correct, Professor? The gem book. The gem book is still with us. And is it kept special in

some fashion, the one that is pictured in? Oh, sorry, the gem, sorry, the jewel itself. Sorry.

No, it's a bit of a kind of metaphor for everything that went wrong in the 17th century. The mirror of Great Britain is the name of this

amazing hat jewel that James is painted with shortly after his accession. And it gives a sort of

symbolic embodiment of his plans for closer union between

Scotland and England and it's a jewel a composite jewel using gems from both the Scottish and

English royal collections. There's also a sort of metaphorical dimension to the title as well,

but that actual hat jewel, no, it was sold and broken up

by his son during the Civil Wars. I wondered about that, given all the attention to crown jewels,

whether it was still there. We have the memory of James I first. He's born in, surrounded by

blood, all the, in Scotland in Edinburgh Castle.

His mother is Mary, Queen of Scots, who is descended from James V, the predecessor.

James the 5th, James the 4th, going back.

These are Scottish kings.

And something that's important to understand then and as late as the 20th century.

I was at New College in Edinburgh for a year after college in America, professor, and I experienced

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