400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=CALENDAR+OR+LETTERS+AND+STATE+PAPERS+RELATING+ENGLISH+AFFAIRS,+PRESENTED+PRINCIPALLY+ARCHIVES+SIMANACS.+martin+a.+s.+hume 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.