The change of the monogram into the cross was very gradual. First one stroke of the X became coincident with the vertical part of the P, and the other at right angles to it, as in No. 6, Fig. 57. At length the loop of the P disappears and the Greek cross results. In the other examples of Fig. 57 the cross, if cross it was at all, was neither in the Greek nor Latin form, but in that known as St. Andrew’s. Finally the lower arm was lengthened till it assumes the form shown in the accompanying engraving, which was found on the grave of a neophyte four years old. The first dated example of a simple undisguised cross in the Catacombs does not occur till A. D. 407;[451] but during the latter part of the fifth century it became quite common. It also became more ornate in form, and was frequently adorned with gems and wreathed with flowers, especially in the later bas reliefs. In the fourth century it had already become an object of such superstitious 271 veneration as to call forth the reproaches of Julian and the extravagant laudation of many of the Christian fathers.[452] In the time of Chrysostom the alleged discovery of the true cross by the Empress Helena was universally received, and “materialized at once,” says Milman, “the spiritual worship of Christianity.”[453] Its position was revealed in a vision and its genuineness proved by the miraculous cures which it performed, as recorded by St. Cyril, afterward bishop of Jerusalem, a reputed eye-witness of the event. The precious relic, distributed throughout Christendom[454] and in minute portions worn as sacred talismans, did much to cultivate a spirit of superstition which culminated in the Romish festivals of the Invention and Exaltation of the Cross, and in the hymns and offices of the church, often bordering, at least, upon idolatrous homage.[455] It also led to the conception of the marvelous legend of the cross in the 272 apocryphal gospels and ancient traditions.[456] The cross thus gradually assumed the form in which it is now generally 273 represented; but it was a sign of joy and gladness, crowned with flowers, adorned with precious stones, “a pledge of the resurrection rather than a memorial of the passion.”[457] It was like the rainbow in the cloud to Noah after the flood--a promise of mercy, not a symbol of wrath. It was not the dead Christ but the glorified Redeemer that the primitive Church presented to the imagination. She lingered not by the empty sepulchre, but followed by faith the risen Lord. The persecuted saints shared the triumph of His victory over death and the grave, and felt that because He lived they should live also.