Henriette Charlotte Leijdesdorff-de Vries died in Camp Westerbork at age 69 on 19 December 1942. She was buried at the Jewish cemetery in Assen on 23 December 1942.
Jewish Historical Museum, Documents collection, inv.nr 3397; Death register of the Jewish community Assen
Henriette Charlotte Leijdesdorff-de Vries committed suicide in camp Westerbork.
Oorlogsarchief Nederlandse Rode Kruis (War archives of the Dutch Red Cross), Coll. Westerbork, nr. 298
This person is commemorated on a memorial in Assen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.