All burials within any burial ground provided under this Act shall be registered in a register book, to be provided by the parochial board providing such ground, and kept for that purpose; and such register book shall be so kept by some officer appointed by the said board to that duty; and in such register books shall be distinguished in what parts of the burial ground the several bodies (the burials of which are entered in such register books) are buried; and in case such burial ground has been provided for more than one parish, such register shall be kept or indexed so as to facilitate searches for entries in such books in respect of bodies from the several parishes; and such register books, or copies or extracts purporting to be thereof, shall be received in all courts as evidence of the burials entered therein.