400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=plays+William+Shakspeare,+pr.+text+corrected+copy+left+G.+Steevens,+selection+notes+most+emient+commentators,+&c.,+A.+Chalmers+william+shakespeare 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.