... taking a closer look at the second one, I can't figure how it comes out to be what the book says it is...

not sure, but I think an attempt at addition might work?

(Which would make the sentiment expressed in the words VERY relevant!)

EDIT
The first one, of course, explains why I set up a couple of Lunchtime Lectures in Lancaster last year, about the nexus between the Tudors and the Stuarts.