"Our Fathers" and "Hail Marys" are traditional Roman Catholic prayers. A Hail Mary (or, in Latin, Ave Maria) forms the basis of the Rosary and is based on Luke 1:28 and 42. Santiago quotes it later on this page ("Hail Mary full of Grace the Lord is with thee. . . .")
An Our Father (Pater Noster in Latin) is commonly known as the Lord's Prayer and is based on the prayer that Christ modeled for His disciples as part of the Sermon on the Mount (see also the video below):
Our Father who art in heaven, hallowed be thy name. Thy kingdom come. Thy will be done on earth as it is in heaven. Give us this day our supersubstantial bread. And forgive us our debts, as we also forgive our debtors. And lead us not into temptation. But deliver us from evil. Amen. (Douay-Rheims Catholic Bible)
For an explanation of the Virgin of Cobre, see Bookmark for page 16.