Section 1078(b) in Police Regulations, Bengal , 1943
(b)All papers despatched (including half-margins, which are returned in original) shall be entered in the issue register (in Bengal Form No. 19) and the value of stamps used for each separate cover shall be duly noted in the column of that register headed "Value of stamp." If more than one communication is sent in one cover, the total value of stamps used should be entered in the prescribed column against one of the entries only, a reference to this entry being given in the "remarks'" column against the remaining communications.