Exercises of piety: or, Meditations on the principal doctrines and duties of religion [electronic resource] : For the use of enlightened and virtuous Christians. / By G.J. Zollikofer, late Pastor of the Reformed Church at Leipsick, in Germany. ; Translated from the French edition, by James Manning, Pastor of the United Congregations of Dissenters in Exeter, Great Britain. ; Abridged, corrected and recommended, by Thaddeus M. Harris, Pastor of the church at Dorchester, Massachusetts, North America