"Hofchronik" is one of my favourite books ...
Marie, Freiin von Redwitz was a lady-in-waiting of Duchess Amélie in Bavaria. After Amélie had married Wilhelm Urach, she cared about Carl Theodor's three daughters Sophie, Elisabeth and Marie Gabrielle. It seems that the whole family loved her a lot. Especially Marie Gabrielle wrote her many letters when she was married to Prince Rupprecht.
The book itself was published by "Verlag für Kulturpolitik, München" in 1924. Its exact title is "Hofchronik. 1888 - 1924". Marie Redwitz writes about everything that happend in Carl Theodor's family, also very common things. She decribes the people around her, weddings (for example those of Marie Valérie of Austria and Mädi of Bourbon - Two Sicilies), trips to Marie José's sisters, etc. Redwitz writes very authentically - in a way, I feel like having seen everything through my own eyes.
Of course, this books is absolutely rare. I bought it last years for about 80€. And I don't think that is was translated into other languages.
BTW: Marie Redwitz didn't write anything about the colour of Marie's eyes ...