APPIAH v. THE REPUBLIC Evidence—Admissibility—Bank documents—Trial for extortion—Allegation that moneys paid into accused's foreign bank account—Bank evidence given by affidavit of a bank official and production of extracts from bank's books—Whether such evidence admissible—Evidence Decree, 1975 (N.R.C.D. 323), ss. 118, 125, 126, 136, 176 and 178 (4).