Beyond the Baths, on the same side of the road, is the most interesting little church of the two saints Nereus and Achilles, Christian slaves who suffered martyrdom in the reign of Diocletian. It is supposed that the Nereus whose body reposes in this ancient church is the person referred to by St. Paul in his greetings to the Roman saints at the close of his Epistle—"Salute Nereus, and his sister, and Olympas, and all the saints which are with them." Bolland, in his Acts of the Saints, mentions that he was a servant in the household of Flavia Domitilla, niece of the celebrated Christian lady of the same name, whose mother was the sister of the Emperor Domitian, and whose two sons were intended to succeed to the imperial throne. This younger Domitilla, although so nearly related to the imperial family, was banished to the island of Pontia, because of her refusal to sacrifice to idols. Her two Christian servants, Nereus and Achilles, accompanied her in her exile, and were afterwards burned alive, along with their mistress, at Terracina, and their ashes deposited in the same resting-place. It is a remarkable circumstance that this church and the catacomb where they were buried at first, should have borne the names of the lowly slaves instead of the name of their illustrious mistress, who was as distinguished by her Christian faith as by her rank. Time brought to these noble martyrs a worthy revenge for their ignoble fate; for when their ashes were taken from the catacomb to this church in the year 524, they were first carried in triumph to the Capitol, and made to pass under the imperial arches, on which was affixed the inscriptions "The Senate and the Roman people to Santa Flavia Domitilla, for having brought more honour to Rome by her death than her illustrious relations by their works." "To Santa Flavia Domitilla, and to the saints Nereus and Achilles, the excellent citizens who gained peace for the Christian republic at the price of their blood." Jeremy Taylor, in his splendid sermon on the "Marriage-ring," has a touching reference to the legendary history of Nereus. The church dedicated to the honour of these Christian slaves has many interesting associations. It stands upon the site of a primitive Christian oratory, called Fasciola, because St. Peter was said to have dropped there one of the bandages of his wounds on the way to execution. And its last reconstruction, retaining all the features of the old architecture with the utmost care, was the pious work of its titular cardinal, Cæsar Baronius, the celebrated librarian of the Vatican, whose Ecclesiastical Annals may be called the earliest systematic work on Church History. The church has an enclosed choir, with two ambones or reading-desks in it, surrounding the altar, as was the custom in the older Christian churches. The mosaics on the tribune representing the "Transfiguration" and "Annunciation" are more than a thousand years old, and are interesting besides as the first embodiments in art of these sacred subjects. Behind the high altar is the pontifical chair, supported by lions, with a Gothic gable, on which Gregory the Great was seated when he delivered his twenty-eighth Homily, a few sentences of which are engraved on the marble.

Beyond the church of Sts. Nereus and Achilles, on the opposite side, where the ground rises thirty or forty feet above the level of the road, there is a rude inscription above the door of a vineyard, intimating that the Tomb of the Scipios is here. This is by far the most interesting of all the monuments on the Appian Way. It was the mausoleum of a long line of the most illustrious names in Roman history—patriots and heroes, whose virtues and honours were hereditary. Originally the sepulchre stood above ground, and the entrance to it was by a solid arch of peperino, facing a cross-road leading from the Appian to the Latin Way; but the soil in the course of ages accumulated over it, and buried it out of sight. It was accidentally discovered in 1780, in consequence of a peasant digging in the vineyard to make a cellar, and breaking through a part of the vaulted roof of the tomb. Then was brought suddenly to light the celebrated sarcophagus of plain peperino stone, which contained the remains of the Roman consul, Lucius Scipio Barbatus, after having been undisturbed for nearly twenty-two centuries. Several other sarcophagi belonging to members of the family were found at the same time, along with two busts, one of which is supposed to be that of the poet Ennius, the friend and companion of Scipio Africanus, whose last request on his deathbed was that he might be buried by his side. Pliny remarks that the Scipios had the singular custom of burying instead of burning their dead; and this is confirmed by the discovery of these sarcophagi. I found the mausoleum to consist of a series of chambers and approaches to them, excavated in the solid tufa rock, not unlike the labyrinthine recesses of the catacombs. The darkness was feebly dispelled by the light of wax tapers carried by the guide and myself; and the aspect of the narrow, low-browed passages and chambers was gloomy in the extreme. Here and there were Latin inscriptions attached to the different recesses where the dead had lain; but they were only copies, the originals having been removed to the Vatican, where the sarcophagus of Lucius Scipio Barbatus and the bust of the poet Ennius may now be seen. The very bones of the illustrious dead have been carried off, and after a series of adventures they are now deposited in a beautiful little monument in the grounds of a nobleman near Padua. The gold signet-ring of Scipio Africanus, with a victory in intaglio on a cornelian stone, found in the tomb of his son, who was buried here, is now in the possession of Lord Beverley. It must be remembered, however, that Scipio Africanus, the most illustrious of his family, and the noblest of all the Roman names, was not interred in this mausoleum. A strange mystery hung over the manner of his death and the place of his burial even in Livy's time. Some said that he died at Rome, and others at Liternum. A fragment of an inscription was found near the little lake at the latter place, beside which he resided during the dignified exile of his later years, which contained only the words—"... ta Patria ... ne ..." Antiquarians have filled out this sentence into the touching epigraph recorded by Livy, which Scipio himself wished to be put upon his tomb: "Ingrata Patria, ne ossa quidem, mea habes," "My ungrateful country, thou hast not even my bones." Empty as the tomb of the Scipios looks, no one can behold it without feelings of profound veneration. The history of the most heroic period of ancient Rome is linked with this tomb; and all the romance of the Punic Wars, of Hannibal and Hasdrubal, pass before the mind's eye, as one gazes upon the desecrated chambers where the son and relatives of the great conqueror had reposed in death.

Within a short distance of the tomb of the Scipios are the most celebrated of all the Columbaria of Rome. Previous to the fifth century of Rome, the bodies of the dead were buried entire, and deposited in sarcophagi; but after that period cremation became the universal custom. The ashes and calcined bones were preserved in ollæ, or little jars like common garden flower-pots, made of the same kind of coarse red earthenware, with a lid attached. These jars were deposited in rows of little niches sunk in the brickwork all round the walls of the tomb, resembling the nests in a pigeon-house; hence the origin of the name. One tomb was thus capable of containing the remains of a large number of persons; no less than six thousand of the freedmen of Augustus being deposited in the Columbarium which bears their name. The entrance to these sepulchral chambers was from the top, descending by an internal stair; and the passages and walls were usually decorated with frescoes and arabesques, illustrating some mythical or historical subject. The names of the dead were carved on marble tablets fixed above the pigeon-holes containing the ashes. Columbaria being only used for dependents and slaves, were generally erected near the tombs of their masters; and hence all along the Appian Way we see numerous traces of them side by side with the gigantic monuments of the patrician families. The Columbaria near the tomb of the Scipios are three in number, and contain the cinerary urns of persons attached to the household of the emperors from the reign of Augustus up to the period of the Antonines, when the system of burying the bodies entire was again introduced. The last discovered Columbarium is the most interesting of the group. Being only thirty-three years exposed, the paintings on the walls and the vases are remarkably well preserved. This tomb contains the ashes of the dependents of Tiberius, the contemporary of our Lord. One pigeon-hole is filled with the calcined bones of the court buffoon, a poor deaf and dumb slave who had wonderful powers of mimicry, and used to amuse his morose master by imitating the gesticulations of the advocates pleading in the Forum. Another pigeon-hole contains the remains of the keeper of the library of Apollo in the imperial palace on the Palatine. A most pathetic lamentation in verse is made by one Julia Prima over the ashes of her husband; and an inscription, along with a portrait of the animal, records that beneath are the remains of a favourite dog that was the pet of the whole household—a little touch of nature that links the ages and the zones, and makes the whole world kin. The whole of this region, called Monte d'Oro, for what reason I know not, seems to have been a vast necropolis, in which not only Columbaria for their slaves and freedmen were built by the great patrician families, but also family vaults for the wealthier middle classes were constructed and sold by speculators, just as in our modern town cemeteries.

Very near the modern gate of the city the road passes under the so-called Arch of Drusus. It consists of a single arch, whose keystone projects on each side about two feet and a half beyond the plane of the frontage; and is built of huge solid blocks of travertine, with cornices of white marble, and two composite columns of African marble on each side, much soiled and defaced, which are so inferior in style to the rest of the architecture that they are manifestly later additions. The whole monument is much worn and injured; but it is made exceedingly picturesque by a crown of verdure upon the thick mass of soil accumulated there by small increments blown up from the highway in the course of so many centuries. It was long supposed that Caracalla had barbarously taken advantage of the arch to carry across the highway at this point the aqueduct which supplied his baths with water. But the more recent authorities maintain that the arch itself, so far from being the monument of Drusus, was only one of the arches built by Caracalla in a more ornamental way than the rest, as was commonly done when an aqueduct crossed a public road. This theory does away at one fell stroke with the idea so long fondly cherished that St. Paul must have passed under this very arch on his way to Rome, and that his eye must have rested on these very stones upon which we gaze now. It is hard to give up the belief that the stern old arch, severe in its sturdiness and simplicity as the character of the apostle himself, did actually cast its haunted shadow over him on the memorable day when, a prisoner in chains in charge of a Roman soldier, he passed over this part of the Appian Way, and it signalised a far grander triumph than that for which it was originally erected. We should greatly prefer to retain the old idea that under that arch Christianity, as represented by St. Paul, passed to its conquest of the whole Roman world; and passed too in character, the religion of the cross, joy in sorrow, liberty in bonds, strength in weakness, proclaiming itself best from the midst of the sufferings which it overcame.

Immediately beyond the Arch of Drusus is the Gate of St. Sebastian, the Porta Appia of the Aurelian wall, protected on either side by two semicircular towers, which from their great height and massiveness have a most imposing appearance. They are composed of the beautiful glowing brick of the ancient Roman structures, and rest upon a foundation of white marble blocks, evidently taken from the Temple of Mars, which once stood close by, and at which the armies entering Rome in triumph used to halt. The gateway was greatly injured in the sixth century during the Gothic War, but was repaired by Belisarius; or, as some say, by Narses. The most remarkable incident connected with it since that period was the triumphal entry into the city of Marco Antonio Colonna, after the victory of Lepanto over the Turks and African corsairs in 1571. This famous battle, one of the few great decisive battles of the world, belongs equally to civil and ecclesiastical history, having checked the spread of Mohammedanism in Eastern Europe, and thus altered the fortunes of the Church and the world. The famous Spanish poet Cervantes lost an arm in this battle. The ovation given to Colonna by the Romans in connection with it may be said to be the last of the long series of triumphal processions which entered the Eternal City; and in point of splendour and ceremony it vied with the grandest of them,—prisoners and their families, along with the spoil taken from the enemy, figuring in it as of old. A short distance outside the gate, the viaduct of the railway from Civita Vecchia spans the Appian Way, and brings the ancient "queen of roads" and the modern iron-way into strange contrast,—or rather, I should say, into fitting contact; for there is a resemblance between the great works of ancient and modern engineering skill in their mighty enterprise and boundless command of physical resources, which we do not find in the works of the intermediate ages.

Beyond the viaduct the road descends into a valley, at the bottom of which runs the classic Almo. It is little better than a ditch, with artificial banks overgrown with weeds, great glossy-leaved arums, and milky-veined thistles, and with a little dirty water in it from the drainings of the surrounding vineyards. And yet this disenchanted brook figures largely in ancient mythical story. Ovid sang of it, and Cicero's letters mention it honourably. It was renowned for its medicinal properties, and diseased cattle were brought to its banks to be healed. The famous simulacrum, called the image of Cybele,—a black meteoric stone which fell from the sky at Phrygia, and was brought to Rome during the Second Punic War, according to the Sybilline instructions,—was washed every spring in the waters of the Almo by the priests of the goddess. So persistent was this pagan custom, even amid the altered circumstances of Christianity, that, until the commencement of the nineteenth century, an image of our Saviour was annually brought from the Church of Santa Martina in the Forum and washed in this stream. In the valley of the Almo the poet Terence possessed a little farm of twenty acres, given to him by his friend Scipio Æmilianus.

After crossing the Almo, two huge shapeless masses of ruins may be seen above the vineyard walls: that on the left is said to be the tomb of Geta, the son of the Emperor Severus, who was put to death in his mother's arms by order of his unnatural brother. Geta's children and friends, to the number, it is said, of twenty thousand persons, were also put to death on the false accusation of conspiracy; among whom was the celebrated jurist Papinian, who, when required to compose a defence of the murder—as Seneca was asked by Nero to apologise for his crime—nobly replied that "it was easier to commit than to justify fratricide." But so capricious was Caracalla that he soon afterwards executed the accomplices of his unnatural deed, and caused his murdered brother to be placed among the gods, and divine honours to be paid to him. It was in this more humane mood that the tomb whose ruins we see on the Appian Way was ordered to be built. The tomb on the right-hand side of the road is a most incongruous structure as it appears at present, having a circular medieval tower on the top of it, and a common osteria or wine-shop in front; but the old niches in which statues or busts used to stand still remain. It was long supposed to be the mausoleum of the Scipios; but it is now ascertained to be the sepulchre of Priscilla, the wife of Abascantius, the favourite freedman of Domitian, celebrated for his conjugal affection by the poet Statius. Covered with ivy and mural plants, the monument has a very picturesque appearance.

The road beyond this rises from the valley of the Almo, and passes over a kind of plateau. It is hemmed in on either side by high ugly walls, shaggy with a profusion of plants which affect such situations. The wild mignonette hangs out its pale yellow spikes of blossoms, but without the fragrance for which its garden sister is so remarkable; and the common pellitory, a near ally of the nettle, which haunts all old ruins, clings in great masses to the crevices, its leaves and ignoble blossoms white with the dust of the road. Here and there a tall straggling plant of purple lithospermum has found a footing, and flourishes aloft its dark violet tiara of blossoms; while bright tufts of wall-flower send up their tongues of flame from an old tomb peering above the wall, as if from a funeral pyre. The St. Mary thistle grows at the foot of the walls in knots of large, spreading, crinkled leaves, beautifully scalloped at the edges; the glazed surface reticulated with lacteal veins, retaining the milk that, according to the legend, flowed from the Virgin's breast, and, forming the Milky Way in mid-heaven, fell down to earth upon this wayside thistle. Huge columns of cactuses and monster aloes may be seen rising above the top of the walls, like relics of a geologic flora contemporaneous with the age of the extinct volcanoes around. But the most curious of all the plants that adorn the walls is a kind of ivy which, instead of the usual dark-greenish or black berries, bears yellow ones. This species is rare, but here it occurs in profusion, and is as beautiful in foliage as it is singular in fruit. The walls themselves, apart from their floral adorning, are very remarkable, and deserving of the most careful and leisurely study. They are built up evidently of the remains of tombs; and numerous fragments of marble sarcophagi, pillars, inscriptions, and rich sculpture are imbedded in them, suggestive of a whole volume of antiquarian lore, so that he who runs may read.

On the right of the road, in a vineyard, are several Columbaria belonging to the family of Cæcilius, an obscure Latin poet, who was a predecessor of Terence, and died one hundred and sixty-eight years before Christ; and on the left are the Columbaria of the freedmen of Augustus and Livia, divided into three chambers. These last when discovered excited the utmost interest among antiquarians; but they are now stripped of all their contents and characteristic decorations, and the inscriptions, about three hundred in number, are preserved in the museums of the Capitol and Vatican. On the same side of the road, in a vineyard, a Columbarium was discovered in 1825 belonging to the Volusian family, who flourished in the reign of Nero; one of whose members, Lucius Volusius, who lived to the age of ninety-three, was extolled on account of his exemplary life by Tacitus.

On the same plateau is the entrance to the celebrated Catacombs of St. Calixtus. It is on the right-hand side of the road, about a mile and a quarter from the present gate, and near where stood the second milestone on the ancient Appian Way. A marble tablet over the door of a vineyard shaded with cypresses points it out to the visitor. The rock out of which this and all the Roman Catacombs were hewn seems as if created specially for the purpose. Recent geological observations have traced in the Campagna volcanic matter produced at different periods, when the entire area of Rome and its vicinity was the seat of active plutonic agency. This material is of varying degrees of hardness. The lowest and oldest is so firm and compact that it still furnishes, as it used to do, materials for building; the foundations of the city, the wall of Romulus, and the massive blocks on which the Capitol rests, being formed of this substance. Over this a later stratum was deposited called tufa granolare, consisting of a similar mechanical conglomerate of scoriæ, ashes, and other volcanic products, but more porous and friable in texture. It is in this last formation, which is so soft that it can be easily hollowed out, and yet so solid that it does not crumble, that the Catacombs are invariably found. There is something that appeals strongly to the imagination in the fact that the early Christians should have formed the homes of their dead and the haunts of their faith in the deposit of the terrible volcano and the stormy sea! The outbursts of the Alban volcanoes were correlated in God's scheme of providence with the outbursts of human fury long ages afterwards; and the one was prepared as a means of defence from the other, by Him who maketh His ministers a flaming fire.