In no conceivable way, on the other hand, could that briefer formula have resulted from the practice of the ancient Church.

The thing, I repeat, is simply impossible.
What need to point out in conclusion that the Church's peculiar method of reciting the Lord's Prayer in the public liturgy does notwithstanding supply the obvious and sufficient explanation of all the adverse phenomena of the case?
It was the invariable practice from the earliest time for the Choir to break off at the words 'But deliver us from evil.' They never pronounced the doxology.

The doxology must for that reason have been omitted by the critical owner of the archetypal copy of St.
Matthew from which nine extant Evangelia, Origen, and the Old Latin version originally derived their text.

This is the sum of the matter.
There can be no simpler solution of the alleged difficulty.

That Tertullian, Cyprian, Ambrose recognize no more of the Lord's Prayer than they found in their Latin copies, cannot create surprise.