Herein is presented the work of Le Pere de Gallifet on Devotion to the Blessed Virgin. The work explains of what devotion to Our Lady consists, the motives for this devotion and the truth from which it flows. Gallifet was born near Aix-en-Provence, France. He entered the Society of Jesus at the age of fifteen, and upon taking up his studies came under the direction of Father de la Colombière, the confessor of Margaret Mary Alacoque. While on a mission of charity during his third year of probation at Lyon, he caught a fever which brought him to death's door. A certain father made a vow in his name that if he were spared, Father de Gallifet would spend his life in the cause of the Sacred Heart. Gallifet recovered and ratified the vow. He wrote this book on the Blessed Virgin, which here is published the first part, and one on the chief virtues of the Christian religion. His major work, De Cultu Sacrosancti Cordis Dei ac Domini Nostri Jesu Christi, appeared in 1726.