400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Octavius,+Ex+iterata+Recensione+Joannis+Davisii+LL.+D.+Coll.+Regin.+Cantab.+Socii;+Cum+ejusdem+animadversionibus+ac+notis+integris+Des.+Heraldi+et+Nic.+Rigaltii,+Nec+non+selectis+aliorum.+Accedit+Commodianus,+Aevi+Cyprianici+Scriptor+(etc.)+marcus+minucius+felix 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.