I'm only part-way thru the bit on Catherine of Aragon; it's like she goes thru part of the time once, then starts back thru it again, hitting difference points. Can be somewhat confusing, if you don't keep your eye on the dates.

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It is hard to convey five-dimensional ideas in a language evolved to scream defiance at the monkeys in the next tree. -- The Science of Discworld III: Darwin's Watch, by Terry Pratchett, Ian Stewart & Jack Cohen