400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=practical+introduction+English+composition,+R.+(and+T.)+Armstrong.+[With]+Key+robert+armstrong+(master+madras+coll.)+thomas+armstrong+(schoolmaster.) 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.