Note that the index numbers are only technical numbers which have no persistence. After a new system generation is done, all of them are invalid. To generate a persistent link, use the name.Use the URL:
http://ww-person.com/cgi-bin/l3/LANG=germ/F=Louis/N=de@Noailles@et@de@Noaillac,@de@Chambres@et@de@la@Chapelle
Louis de Noailles et de Noaillac, de Chambres et de la Chapelle
alternatively: /cgi-bin/llmult/LANG=germ/P=6008425
Louis de Noailles et de Noaillac, de Chambres et de la Chapelle