Although Dr. Schaff's favorite pursuit was Historical Theology, and to this his life was consecrated, yet exegesis always attracted his attention. This was one of the two subjects upon which he lectured as privat-docent at the beginning of his university career. And it was the theme of the chair he occupied in the Union Theological Seminary from 1875 until he was called to succeed Dr. R. D. Hitchcock in Church History. It also occupied his attention in the Scripture Commentaries, which he edited, and of which he was in part the author. Although in early life he studied both Testaments, and at one time gave instruction in Hebrew, yet in after years he devoted himself mainly to the Greek Testament, and here his profiting: appeared unto all.