Provided always, and be it enacted, That if the said Master shall from Sickness or other unavoidable Cause have Occasion to be absent from the Business of his Office for a longer Period than Two Months at any One Time, then and in every such Case it shall be lawful for the Lord Chancellor to give Leave of Absence, by his Order in Writing, to such Master, and, if necessary, to appoint a Deputy in his Place during such Time as shall be expressed in such Order; and the Name of such Deputy, and the Cause and Time of such Absence, shall be stated in such Order; and such Deputy may, if Occasion require it, be changed by the Lord Chancellor; and every Deputy so appointed shall be paid out of the said Fund as the Salary of the said Master is chargeable upon such Remuneration for his Services as the Lord Chancellor shall direct in such Order, not being in any Case less than One Third of the Amount of the Salary of such Master.