Chamisso, A. von. Correspondance d'Adelbert de Chamisso ... 1934.
Wikipedia, viewed 31 July 2014 (Helmina von Chézy (26 January 1783 – 28 February 1856), née Wilhelmine Christiane von Klencke, was a German journalist, poet and playwright ... Helmina was born in Berlin ... She died in Geneva ...) http://en.wikipedia.org/wiki/Helmina_von_Chézy