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=René@Auguste@Marie@Marcel@Charles/N=du@Breil@de@Pontbriant@de@La@Caunelaye
René Auguste Marie Marcel Charles du Breil de Pontbriant de La Caunelaye
alternatively: /cgi-bin/llmult/LANG=germ/P=6009503
René Auguste Marie Marcel Charles du Breil de Pontbriant de La Caunelaye