Protestant theologian and a Church historian (1819–1893). Original 2.5 x 4 carte-de-visite bust portrait by D. Appleton & Co. of New York, signed and inscribed on the reverse in black ink, “Rev. Dr. E. S. Porter, With the kind regards of Phil. Schaff, Andover, Mas., Jan. 27, 1863.” In fine condition. RR Auction COA.