The Dunkelgraf mystery /
Maeckel, Otto Viktor.
Le Blond, Aubrey,Mrs.,-1934
London : Hutchinson,
[1929]
English edition, revised, of Das Rätsel von Hildburghausen.
The author supports the theory that the occupant of the castle at Einhausen, near Hildburghausen, calling himself Vavel de Versay, was Leonardus Cornelius van der Valck, and that his companion was Marie Thérèse Charlotte, daughter of Louis XVI.
Angoulême, Marie-Thérèse Charlotte, duchesse d', 1778-1851.
Valck, Leonardus Cornelius van der, 1769-1845.