400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Appian... Des Guerres des Romains, livres XI traduits par Claude Seyssel...plus deux livres traduits par Des Avenelles appien seyssel because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.