Cornelius, presently to be visited in a catacomb under this same vineyard, whence his body was translated some thirty or forty years before St. Cecilia’s. In both cases these priests probably signed as witnesses of the translation. It only remains that we should fulfil our promise to say a word or two about those saints whose names and figures we saw in the _luminare_. They are three in number, St. Sebastian, St. Cyrinus, and St. Polycamus. We know of no other Sebastian that can be meant here but the famous martyr, whose basilica we have mentioned before as being not far off. Cyrinus, or Quirinus, was Bishop of Siscia in Illyria, and martyr. In the days of Prudentius his body lay in his own city, but when Illyria was invaded by the barbarians it was brought to Rome and buried in the Basilica of St. Sebastian about the year 420. Of Polycamus the history is altogether lost; neither ecclesiastical historians nor martyrologists have left us any record of his life. We know, however, from the Itineraries of the old pilgrims that there was the tomb of one Polycamus, a martyr, near that of St. Cecilia, and the same name appears among the martyrs whose relics were removed from the Catacombs to the churches within the city. It would seem then that the figures of these three saints were painted in the _luminare_ of this chamber, only because they were saints to whom there was much devotion, and whose relics were lying at no great distance. CHAPTER III. THE CRYPT OF ST. EUSEBIUS. From the crypt of St. Cecilia we pass through a modern opening in one of its walls to a short gallery which leads to the sacramental chapels—_i.e._, to those chambers whose walls are decorated with a remarkable series of paintings having reference to the Sacraments of Baptism and the Holy Eucharist. These paintings, however, having been sufficiently described and commented upon in another place, we may take our leave of this first area of the Cemetery of Callixtus, and, ascending a short staircase, pass on through the broken wall of a chamber into a wide and lofty gallery, which brings us presently to the chief object of interest in the second area—viz., the crypt of St. Eusebius, Pope, A.D. 310. Just before we reach it, we shall see on our left hand the staircase by which it was anciently arrived at; and if we stop here for a moment and look around us, we shall recognise an example of what has been already mentioned, the exemplary care and prudence with which the pilgrims of old were guided in their subterranean visits. Walls were built, blocking up all paths but the right one, so that they should not go astray or lose themselves in the labyrinth which surrounded them. They must needs go forward till they arrived at two chapels, which stood opposite to one another on different sides of the gallery.