M’s daughter R was married to P. During August, 1993, when R was residing with her parents at Bombay, P wrote two letters to R from Calcutta which contained defamatory imputations about M. M filed a complaint charging P with the offence of defamation. P raised the plea that the two letters complained about were inadmissible in evidence as they were expressly prohibited by law from disclosure. Decided the case.    (10 marks)