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=Ernst@Casimir@I./N=zu@Ysenburg@u.@Büdingen@in@Büdingen
Ernst Casimir I. zu Ysenburg u. Büdingen in Büdingen
alternatively: /cgi-bin/llmult/LANG=germ/P=34000874