Oeniponti/ Londini/Taurini/ Parisiis, Libraria Academica Wagneriana/ Nutt/ Marietti/ Albanel 1872 284pp., in the series "Sanctorum Patrum Opuscula selecta. Edidit et commentariis auxit H.Hurter S.J." vol.18, 13.5x9cm., stamp, pages uncut, G, [text in latin], [Selected letters of the roman popes Innocentius, Zosimus, Bonifacius & Coelestinus]