Preliminary Inquiries Act, 1851

Inspectors may summon witnesses and examine them upon oath.

4. For the purposes of such inquiry the said inspector or inspectors may, by summons under his or their hands, summon before him or them any person having the custody of any map, survey, or book made or kept in pursuance of any Act of Parliament to produce such map, survey, or book for his or their inspection, and the said inspector or inspectors may summon, in manner aforesaid, any other person whose evidence shall, in the judgment of the said inspector or inspectors, be material to his or their inquiries, and pay or allow to every such person so summoned by him or them the reasonable charges of his attendance; and the said inspector or inspectors shall also have power to administer an oath to all persons who may be examined by him or them touching the premises.