Section 17: Every inspector appointed under sections 13 or 16 hereof !'owersof

11 h mspectors of sha ave power- railways. (i) to enter upon and inspect any railway, and all the stations, works, buildings, offices, stock, plant, and machinery belonging thereto; (ii) by summons under his hand to require the attendance of any person who is engaged in the management of the railway, or who is in the service or employment of the owner thereof, and whom he thinks fit to call before him and examine on oath for the purpose of the inspection he is appointed to make, and to require from any such person answers or returns to such inquiries as he thinks fit to make for the purpose; . (iii) to requj.re and enforce the production of all books, papers, and documents relating to the railway which he considers expedient for the said purpose.