400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Les+prosateurs+français,+recueil+morceaux+choisis,+avec+une+notice+biogr.+et+critique+sur+chaque+auteur,+par+A.+Roche+antonin+roche 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.