"Were you ever in the Catacombs?"

      "Once, long ago, a fossor guided me. I remained but a short time. My impression was that it was the most terrible place in all the world."

      "I have heard of the Catacombs, but never before knew anything about them. It is strange that they are so little known. Could not these fossors be engaged to lead the guards through this labyrinth?"

      "No. They will not betray the Christians."

      "Have they been tried?"

      "Certainly. Some comply, and lead the officers of justice through a network of passages till they get bewildered. Their torches become extinguished, and they grow terrified. Then they ask to be led back. The fossor declares that the Christians must have fled, and so takes back the soldiers to the starting point."

      "Are none resolute enough to continue on till they find the Christians?"

      "If they insist upon continuing the search the fossor will lead them on forever. But he merely leads them through the countless passages which intersect some particular district."

      "Are none found who will actually betray the fugitives?"

      "Sometimes; but of what use is it? Upon the first alarm, every Christian vanishes through the side ways, which open everywhere."

      "My prospect of success seems small."

      "Very small, but much is hoped from your boldness and shrewdness. If you succeed in this enterprise it will be your fortune. And now, farewell. You have learned from me all that I know. You will find no difficulty in learning more from any one of the fossors."

      So saying, Lucullus departed. Marcellus leaned his head on his hands, and lost himself in thought. But ever amid his meditations came floating the strains of that glorious melody which told of triumph over death:

      CHAPTER III.

      THE APPIAN WAY

      "Sepulchers in sad array

      Guard the ashes of the mighty

      Slumbering on the Appian Way."

      Marcellus entered upon the duty that lay before him without delay. Upon the following day he set out upon his investigations. It was merely a journey of inquiry, so he took no soldiers with him. Starting forth from the Pretorian barracks, he walked out of the city and down the Appian Way.

      This famous road was lined on both sides with magnificent tombs, all of which were carefully preserved by the families to whom they belonged. Further back from the road lay houses and villas as thickly clustered as in the city. The open country was a long distance away.

      At length he reached a huge round tower, which stood about two miles from the gate. It was built with enormous blocks of travertine, and ornamented beautifully yet simply. Its severe style and solid construction gave it an air of bold defiance against the ravages of time.

      At this point Marcellus paused and looked back. A stranger in Rome, every view presented something new and interesting. Most remarkable was the long line of tombs. There were the last resting-places of the great, the noble, and the brave of elder days, whose epitaphs announced their claims to honor on earth, and their dim prospects in the unknown life to come. Art and wealth had reared these sumptuous monuments, and the pious affection of ages had preserved them from decay. Here where he stood was the sublime mausoleum of Caecilia Metella; further away were the tombs of Calatinus and the Sarvilii. Still further his eye fell upon the resting-place of the Scipios, the classic architecture of which was hallowed by "the dust of its heroic dwellers."

      The words of Cicero recurred to his mind, "When you go out of the Porta Capena, and see the tombs of Calatinus, of the Scipios, the Sarvilii, and the Metelli, can you consider that the buried inmates are unhappy?"

      There was the arch of Drusus spanning the road: on one side was the historic grotto of Egeria, and further on the spot where Hannibal once stood and hurled his javelin at the walls of Rome. The long lines of tombs went on till in the distance it was terminated by the lofty pyramid of Caius Cestius, and the whole presented the grandest scene of sepulchral magnificence that could be found on earth.

      On every side the habitations of men covered the ground, for the Imperial City had long ago burst the bounds that originally confined it, and sent its houses far away on every side into the country, till the traveler could scarcely tell where the country ended and where the city began.

      From afar the deep hum of the city, the roll of innumerable chariots, and the multitudinous tread of its many feet, greeted his ears. Before him rose monuments and temples, the white sheen of the imperial palace, the innumerable domes and columns towering upward like a city in the air, and high above all the lofty Capitoline mount, crowned with the shrine of Jove.

      But, more impressive than all the splendor of the home of the living was the solemnity of the city of the dead.

      What an array of architectural glory was displayed around him! There arose the proud monuments of the grand old families of Rome. Heroism, genius, valor, pride, wealth, everything that man esteems or admires, here animated the eloquent stone and awakened emotion. Here were the visible forms of the highest influences of the old pagan religion. Yet their effects upon the soul never corresponded with the splendor of their outward forms, or the pomp of their ritual. The epitaphs of the dead showed not faith, but love of life, triumphant; not the assurance of immortal life, but a sad longing after the pleasures of the world.

      Such were the thoughts of Marcellus as he mused upon the scene and again recalled the words of Cicero, "Can you think that the buried inmates are unhappy?"

      "These Christians," thought he, "whom I am now seeking, seem to have learned more than I can find in all our philosophy. They not only have conquered the fear of death, but have learned to die rejoicing. What secret power have they which can thus inspire even the youngest and the feeblest among them? What is the hidden meaning of their song? My religion can only hope that I may not be unhappy, theirs leads them to death with triumphant songs of joy."

      But how was he to prosecute his search after the Christians? Crowds of people passed by, but he saw none who seemed capable of assisting him. Buildings of all sizes, walls, tombs, and temples were all around, but he saw no place that seemed at all connected with the Catacombs. He was quite at a loss what to do.

      He went down into the street and walked slowly along, carefully scrutinizing every person whom he met, and examining closely every building. Yet no result was obtained from this beyond the discovery that the outward appearance gave no sign of any connection with subterranean abodes. The day passed on, and it grew late; but Marcellus remembered that there were many entrances to the Catacombs, and still he continued his search, hoping before the close of the