3 It is specially deserving of notice, and it gives Us the greatest pleasure to recall, that of all the forms of devotion to the Blessed Virgin, that most excellent method of prayer, Mary's Rosary, is establishing itself most widely in popular esteem and practice. This, We repeat, is a source of great joy to Us. If We have spent so large a share of our activities in promoting the Rosary devotion, We can easily see with what benevolence the Queen of Heaven has come to Our aid when We prayed to her; and We express the confident conviction that she will continue to stand at Our side to lighten the burdens and the afflictions which the days to come will bring.
Source: Adiutricem (Vatican.va)