Section-160. Testimony to facts stated in document mentioned in section 159
A witness may also
testify to facts mentioned in any such document as is mentioned is section 159,
although he has no specific recollection of the facts themselves, if he is sure
that the facts were correctly recorded in the document. Illustration A book- keeper may
testify to facts recorded by him in books regularly kept in the course of
business, if he know that the books were correctly kept, although he has
forgotten the particular transactions entered.