Which of the following is not a secondary evidence?

S. 58. Secondary evidence includes— (i) certified copies given under the provisions hereinafter contained; (ii) copies made from the original by mechanical processes which in themselves ensure the accuracy of the copy, and copies compared with such copies; (iii) copies made from or compared with the original; (iv) counterparts of documents as against the parties who did not execute them; (v) oral accounts of the contents of a document given by some person who has himself seen it; (vi) oral admissions; (vii) written admissions; (viii) evidence of a person who has examined a document, the original of which consists of numerous accounts or other documents which cannot conveniently be examined in Court, and who is skilled in the examination of such documents.