400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Illustrium virorum Epistolae, Hebraicae, Graecae, et Latinae Ioannem Reuchlin Phorcensem... diversis temporibus missae, quibus iam pridem additus est liber secundus nunquam antea editus johannes reuchlin anshelm 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.