When, however, in progress of time, all fear of danger was past, the same series of sacred subjects as are seen in the fresco-paintings of the second and third centuries is reproduced in the marble monuments of the fourth and fifth; only they appear, of course, in their later, and not in their earlier form; often even in a still more developed and literally historical form than in any of the subterranean paintings. Thus Adam and Eve no longer stand alone, one on either side of the fatal tree, but the Three Persons of the Holy Trinity are introduced in the work of creation and the promise of redemption. Adam receives a wheat sheaf, in token that as a punishment for his sin he shall till the ground, and to Eve a lamb is presented, the spinning of whose wool is to be part of her labour. Daniel does not stand alone in the lions’ den, but Habacuc is there also, bearing in his hand bread, and sometimes fish, for the prophet’s sustenance. To the resurrection of Lazarus the figure of one of his sisters is added, kneeling at our Lord’s feet, as though petitioning for the miracle. Our Lord stands between St. Peter and St. Paul, and He gives to one of them a volume, roll, or tablet, representing the new law of the Gospel. On the gilded glasses which belong to the same period the legend is added, _Lex Domini_, or _Dominus legem dat_. The Apostles are distinguished, the one as the Apostle of the Jews, the other of the Gentiles; and even two small temples or churches are added, out of which sheep are coming forth; and over one is written Jerusalem, and over the other Bethlehem. This is a scene with which we are familiar in the grand old mosaics of the Roman Basilicas, a further development of Christian art, to which, as far as the choice of subjects is concerned and the mode of executing them, the sculpture may be considered a sort of intermediate step after the decline of painting. [Illustration: _Glass in the Vatican Library._ Representing Christ between SS. Peter and Paul; also Christ as the Lamb, and the faithful as Lambs—Jews and Gentiles coming from Jerusalem and Bethlehem (_Becle_) to Mount Sion, whence flow the four Evangelical Streams, united in the Mystical Jordan.]