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=fran/F=Arnaud@III@Odon/N=de@Lomagne@et@d'Auvillars
Arnaud III Odon de Lomagne et d'Auvillars
alternatively: /cgi-bin/llmult/LANG=germ/P=6024910