A number of sermons have been published by request, among them the "Sermon on the Fiftieth Anniversary of the South Street Presbyterian Church".
Addresses on "Prophetic and other Bible Studies" have been printed in Annual Reports of the Bible Conference at Niagara-on-the-Lake, Ontario, and, besides these, many fugitive newspaper articles of value and importance.
Dr. Erdman has been largely interested in the general welfare, and especially the philanthropies, of the town, outside of his immediate church, and by this public spirit, earnestly and fearlessly manifested, in many instances, he has no doubt greatly extended his sphere of influence.
He has been a warm supporter of, and has given much time and personal attention to the establishment of the Morris County Charities Aid Association and of the State Association which followed, carefully studying the questions of pauper and criminal reform for which purpose this organization exists.
In the Semi-Centennial Sermon we find the following remarkable record:
EXTRACT FROM THE SEMI-CENTENNIAL SERMON ON THE 50TH ANNIVERSARY OF THE CHURCH'S ORGANIZATION.
I must note the unique fact that the history of these fifty years of Church life is the history of uninterrupted prosperity. Even that which seemed at the time to be against us—the destruction by fire of the former house of worship—proved to be, as are all the Lord's afflictions, a blessing in disguise; for the history of the church since is that of continued and ever-increasing prosperity, if growing numbers and enlarged usefulness be criterion of success. A spirit of harmony and goodwill mark its whole course, and it is, therefore, with unmingled pleasure and gratitude to God, we may recall the past. No roots of bitterness and strife to be covered up, no rocks of offense to be carefully avoided!
How the memories of the past throng around us—the saintly lives of fathers and mothers, the godly service and earnest prayers of pastors and people, the fervent appeals from pulpit and teacher's chair,—surely it would seem there could be no valid reason why any should be still unsaved or unwilling to take up the duties of Christian service.
Finally, as we here recall the story of the past and rejoice in the prosperity of the present, and while we look forward to still larger service and blessing in the days to come, let us, with a deep sense of our unworthiness and dependence, say, with the Psalmist: "Not unto us, O Lord, not unto us; but unto Thy name be all glory."