400. That’s an error.

Google cannot redirect you to http://dogbert.abebooks.com/servlet/SearchResults?tn=Nouveau+recueil+g%C3%A9n%C3%A9ral+trait%C3%A9s,+conventions+et+autres+transactions+remarquables,+servant+%C3%A0+connaissance+des+relations+%C3%A9trang%C3%A8res+des+puissances+et+%C3%A9tats+dans+leurs+rapports+mutuels 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.