(That's part of the reason for all the debate over the Wars of the Roses and Richard III.)
Here's the cover I remember, library edition in the local Cobb County library:
That's funny ( and I mean in the LOL sense )....that's the same cover as the Audrey Williamson book and NOTHING at all like the one on my Weir book. *shrugs*
OTOH, there is a cornucopia of hard documentation on my most favorite era/s, Victoria/Edwardian England and to a somewhat lesser degree, America during that time span.