400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Works+Right+Reverend+William+Warburton,+D.D.,+Lord+Bishop+Gloucester+william+warburton+(bp.+gloucester)+richard+hurd 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.