The Catholic Church Extension Society has been founded in Canada, for the conservation and propagation of the Catholic Faith in our mission districts. Its very name, as we readily see, shows forth its object and explains its existence. Canada, as we all know, possesses vast areas, in her Western Provinces particularly, where the Church has not yet established the influence of her permanent organization. There, her children suffer from the prolonged absence of her teaching, of her sacraments, of her authority, and are struggling against the abiding presence of numerous, rich, aggressive, and unscrupulous proselytizers. Yet, on the vast stretches of prairie, where the lonely homesteader has just broken the virgin soil, amid the snows of the bleak North, by the rushing waters of the Fraser, the Mackenzie, the Peace, and the Saskatchewan Rivers, in the far distant valleys of the Rockies--the words of the Master are still a living reality. . . . "The fields are ready for the harvest and the workers are few." The Extension Society has been established in Canada to point out to our Catholic laity these fields where the harvest is waiting and to help to send labourers into them. Its sublime mission is to _bridge the chasm_ which separates the East from the West. It is the binding and living link between the organized Church and the mission field. This sublime object of the Society makes it most worthy of our commendation and of your loyal and generous support. Principle and policy are the basic ideas of organized action. If the principles upon which an organization rests are true and elevating, if the policy it advocates and which governs its activities is practical, easy, and attractive, the organization itself is bound to meet in time with an unlimited success. The higher the principles, the more inviting the policy, the more living and telling will be the resultant action. Therefore, to place before our readers the principles and policy of the Catholic Extension Society will no doubt help them to understand better its claims and respond more generously to its appeal. _I.--Principles_ The Kingdom of God comes upon earth through the Apostolate of the Church. "As the Father sent me, I also send you," said Christ to His Apostles, and to all who were to take their place in succeeding generations. For, these words of Christ created the Catholic Apostolate and maintain it. His words, indeed, are words of life. The Apostolate of the Church is an absolute necessity, the very condition of Her existence and progress. The Catholic Church Extension is one of the most beautiful expressions of that Apostolate, for its object is, as we stated, the conservation and propagation of the Faith in the Mission districts of Canada. The principles upon which the activities of this Society are based may be reduced to two: the _doctrinal_ and the _historic_: