historical
research
Hennig, Richard (1912):Ein hundertjähriges Geheimnis. / Eine geheimnisvolle Prinzessin.
In: Zeiten und Völker, volume 1: page 6-10 / volume 2: page 39-44, volume 4: page 86-91.
Francksche Verlagshandlung - Stuttgart
Content:
For the first time Hennig made a comparison between the
portraits of the Madame Royale and the later Duchess of Angoulême. In
addition he made a comparison between the handwritings. His result
is, that the Madame Royale and the later Duchess of Angoulême are two
different person.