(2)The inspector shall keep in his custody the books and papers seized under this section for such a period not later than the conclusion of the investigation as he considers necessary and thereafter shallreturn the same to the company or the other body corporate, or, as the case may be, to the managing director or the manager or any other person from whose custody or power they were seized:Provided that the inspector may, before returning such books and papers as aforesaid, take copies of, or extracts from them or place identification marks on them or any part thereof or deal with the same in such manner as he considers necessary.