J. Spencer Northcote, A visit to the Roman catacombs (1891)
“ It is necessary that we should learn another, and, as it would seem, a still more common use of the fish. Just as the dove might stand for the Holy Ghost, and also for a soul sanctified by the Holy Ghost—just as the lamb or sheep might stand either for the Lamb of God, or for those who are “the people of His pasture and the sheep of His hand”—so the fish, too, was used not only to represent a Christian, but also, still more frequently perhaps, Christ Himself. ”
