But in the case the grantor be dead, or cannot appear, then the witnesses brought before such justice shall by him be examined upon oath or affirmation, to prove the execution of the deed then produced. Whereupon the same justice shall, under his hand and seal, certify such acknowledgment or proof upon the back of the deed, with the day any year when the same was made, and by whom, and that after the recorder has recorded any of the said deeds, he shall certify on the back thereof, under his hand and seal of his office, the day he entered it, and the name or number of the book or roll, and page, where the same is entered.