What Is The Breviary Prayer Origin?

Thank you for your informative site. I came here while searching for the origins of the "Invocation," which you refer to as the "Breviary Prayer," and I see that it is indeed in that style.

However, when I searched for it in my own Breviary I could not find it. I have the 4 volume set of The Divine Office/Liturgy of the Hours, published by the Catholic Book Publishing Company, copyright 1975. I do not find it there under the October 7th Feast of the Holy Rosary listing (Vol. IV), nor is it among the prayers in the Common of the Blessed Virgin.

Was it present in an earlier edition?

Added to a later edition?

What can you tell me that would shed some light on the use of this prayer in the Liturgy of the Hours?

Clearly it was written specifically for the rosary; I am trying to get an understanding of the origin, and perhaps authorship, of the prayer. Thank you for your help.

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