I am under great obligations to my friends, Rev. Dr. Plumer and the Rev. Dr. Murray, for the powerful and graphic chapters which they have contributed to these pages. The facts they have embodied, and thecall to prayer which they utter, must produce a deep impression on every devout reader. Never was my own mind so filled with awe, as it has been while grouping these facts into consecutive pages and chapters. Never was the connection be tween prayer and the answer, the relation of the Asker to the Giver, so revealed to me as in the prosecution of this work. Here I find it confirmed by scores of facts and examples, not in history, sacred or secular; not traditionary or second-hand, but facts of present occurrence, in the midst of this noisy, busy, restless, worldly city; facts beyond all doubt or cavil, that the Lord will give his praying people whatsoever they ask in faith! We raise no question about miracles. We know what things are agreeable to God's will, and what submission requires. Here is the written proof that God will answer prayer, and no religious man can enter into the spirit of these prayer-meetings, or read the accounts here presented, without being overshadowed with the conviction that it is a solemn as well as a blessed privilege to pray; that God is willing to give his Spirit to them who ask him; and that believing prayer is sure to be answered.