400. That’s an error.

Google cannot redirect you to http://dogbert.abebooks.com/servlet/SearchResults?tn=Le+proc%C3%A8s+Louis+XVI,+ou,+Collection+complette,+des+opinions,+discours+et+m%C3%A9moires+des+membres+Convention+nationale,+sur+les+crimes+Louis+XVI+... 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.