Section XVII. And it is hereby enacted, that no obliteration, interlineations or other alteration made in any will

XVII. And it is hereby enacted, that no obliteration, interlineations or other alteration made in any will after the execution thereof, shall be valid or have any effect, except so far as the words or effect of the will before such alteration shall not be apparent, unless such alteration shall be executed in like manner as hereinbefore is required for the execution of the will ; but the will, with such alteration as part thereof, shall be deemed to be duly executed, if the margin or some other part of the will opposite or near to such alteration, or at the foot or end of or opposite or near to such alteration, or at the foot or end of or opposite to a memorandum referring to such alteration, and written at the end or some other part of the will.