28 Through the intercession of the Most Blessed Immaculate Virgin, may your diligent efforts be made fruitful by the Apostolic Blessing which, in token of Our affection and as a pledge of heavenly favors, We wholeheartedly impart to you and to your clergy and people. Given at Rome, at Saint Peter's, on the fifteenth day of April, 1905, in the second year of Our Pontificate.
Source: Acerbo Nimis (Vatican.va)