WE know no better preface to the following pages than the few remarks handed by their author, when submitting them for approval, to the Director-General of the Association of the Apostleship of Prayer. He speaks as follows: "To-day, the Apostleship of Prayer is established in many portions of the Christian world, and counts six million names on its roll of membership. So widely established and so Catholic an association should have its catechism. This idea, which I had long entertained, you were pleased to approve highly when we met at Ronle. I have the honor at present of subll1itting to your reverence the result of my labors. "In the catechetical form adopted, I address those who are prevented from reading the larger works which so fully set forth the object of our Association, and the style is intelligible even to the least cultivated minds. Those, to whom is intrusted the care of instructing others, will find in the following pages the substantial idea of the Apostleship, expressed in as comprehensive and clear a manner as possible. So often have I had occasion to admire the rare success of such catechetical instructions for instilling into young minds a knowledge and esteem of pious objects, that I promise myself not a little good from this poor effort of mine to adyance the interests of the Sacred Heart and to enlarge the useful sphere now filled by the Apostleship of Prayer."