I've meant to read this for ages but only managed to pick up a (signed) copy of the book on my last trip to Glamis (home of the Strathmores) a few weeks ago ... and I am pretty sure this book is actually about the Countess of Strathmore.
And then I read the first quote:
Those who profess to range in the wide and unbounded Field of inexhaustible Imagination, may boldly cull the sweet, tho’ wild flowers of Fancy, unfettered in their progress by the strict rules which Truth imposes; - not so the Historian, the Biographer, or the humbler Narrator of any particular Event, which tho’ actually true, is so uncommon as to stagger the belief of Posterity, when the persons in whose days those Scenes were transacted have ceased to exist.
Mary Eleanor Bowes, Countess of Strathmore
Yep. I'm totally thrilled to be reading this. I hope it's good and does the underlying history justice.