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=engl/F=Robert/N=du@Gard@de@Fresneville@*@de@la@Chaud@et@de@Crousaz
Robert du Gard de Fresneville * de la Chaud et de Crousaz
alternatively: /cgi-bin/llmult/LANG=germ/P=6028860