Where a person whose name has been entered in the said general jury book dies, or becomes disqualified as a juror, whether from loss of property, absence, or other legal cause, the sheriff principal, in making returns of jurors in accordance with the provisions of this Act, shall pass over the name of that person, but the date at which his name shall have been so passed over, and the reason therefor, shall be entered at the time in the said general jury book.