Lesturgeon, H. A. and H. A. Th. (1930): Marie Antoinette en haar kinderen. Tjeenk Willink & Zoon - Haarlem
Content: The authors believes, the there was a close relationship between L.C. van der
Valck and the French
Rouget de Lisle. By that relationship probably van der
Valck became the protector of Madame Royale.