historical
research
Piltz, Georg (1988):Das Geheimnis von Hildburghausen.
In: Tödliche Freundschaft. Kriminalfälle aus sechs Jahrhunderten, page 237-283.
Verlag Das Neue Berlin - Berlin
Content:
The author gives a short summary of the secret of the Dark Countess
and the Dark Count on 50 pages. He is sure, that the Dark Countess was the
Madame Royale.