The custode soon returned, and led us down the darksome steps, chattering in Italian all the time. It is not a very long descent to the lower cell, the roof of which is so low that I believe I could have reached it with my hand. We were now in the deepest and ugliest part of the old Mamertine Prison, one of the few remains of the kingly period of Rome, and which served the Romans as a state-prison for hundreds of years before the Christian era. A multitude of criminals or innocent persons, no doubt, have languished here in misery, and perished in darkness. Here Jugurtha starved; here Catiline's adherents were strangled; and, methinks, there cannot be in the world another such an evil den, so haunted with black memories and indistinct surmises of guilt and suffering. In old Rome, I suppose, the citizens never spoke of this dungeon above their breath. It looks just as bad as it is; round, only seven paces across, yet so obscure that our tapers could not illuminate it from side to side—the stones of which it is constructed being as black as midnight. The custode showed us a stone post, at the side of the cell, with the hole in the top of it, into which, he said, St. Peter's chain had been fastened; and he uncovered a spring of water, in the middle of the stone floor, which he told us had miraculously gushed up to enable the saint to baptize his jailer. The miracle was perhaps the more easily wrought, inasmuch as Jugurtha had found the floor of the dungeon oozy with wet. However, it is best to be as simple and childlike as we can in these matters; and whether St. Peter stamped his visage into the stone, and wrought this other miracle or no, and whether or no he ever was in the prison at all, still the belief of a thousand years and more gives a sort of reality and substance to such traditions. The custode dipped an iron ladle into the miraculous water, and we each of us drank a sip; and, what is very remarkable, to me it seemed hard water and almost brackish, while many persons think it the sweetest in Rome. I suspect that St. Peter still dabbles in this water, and tempers its qualities according to the faith of those who drink it.
The staircase descending into the lower dungeon is comparatively modern, there having been no entrance of old, except through the small circular opening in the roof. In the upper cell the custode showed us an ancient flight of stairs, now built into the wall, which used to lead from the Capitol. The whole precincts are now consecrated, and I believe the upper portion, perhaps both upper and lower, are a shrine or a chapel.
I now left S———in the Forum, and went to call on Mr. J. P. K———at the Hotel d'Europe. I found him just returned from a drive—a gentleman of about sixty, or more, with gray hair, a pleasant, intellectual face, and penetrating, but not unkindly eyes. He moved infirmly, being on the recovery from an illness. We went up to his saloon together, and had a talk—or, rather, he had it nearly all to himself—and particularly sensible talk, too, and full of the results of learning and experience. In the first place, he settled the whole Kansas difficulty; then he made havoc of St. Peter, who came very shabbily out of his hands, as regarded his early character in the Church, and his claims to the position he now holds in it. Mr. K———also gave a curious illustration, from something that happened to himself, of the little dependence that can be placed on tradition purporting to be ancient, and I capped his story by telling him how the site of my town-pump, so plainly indicated in the sketch itself, has already been mistaken in the city council and in the public prints.
February 24th.—Yesterday I crossed the Ponte Sisto, and took a short ramble on the other side of the river; and it rather surprised me to discover, pretty nearly opposite the Capitoline Hill, a quay, at which several schooners and barks, of two or three hundred tons' burden, were moored. There was also a steamer, armed with a large gun and two brass swivels on her forecastle, and I know not what artillery besides. Probably she may have been a revenue-cutter.
Returning I crossed the river by way of the island of St. Bartholomew over two bridges. The island is densely covered with buildings, and is a separate small fragment of the city. It was a tradition of the ancient Romans that it was formed by the aggregation of soil and rubbish brought down by the river, and accumulating round the nucleus of some sunken baskets.
On reaching the hither side of the river, I soon struck upon the ruins of the theatre of Marcellus, which are very picturesque, and the more so from being closely linked in, indeed, identified with the shops, habitations, and swarming life of modern Rome. The most striking portion was a circular edifice, which seemed to have been composed of a row of Ionic columns standing upon a lower row of Doric, many of the antique pillars being yet perfect; but the intervening arches built up with brickwork, and the whole once magnificent structure now tenanted by poor and squalid people, as thick as mites within the round of an old cheese. From this point I cannot very clearly trace out my course; but I passed, I think, between the Circus Maximus and the Palace of the Caesars, and near the Baths of Caracalla, and went into the cloisters of the Church of San Gregorio. All along I saw massive ruins, not particularly picturesque or beautiful, but huge, mountainous piles, chiefly of brickwork, somewhat tweed-grown here and there, but oftener bare and dreary. … . All the successive ages since Rome began to decay have done their best to ruin the very ruins by taking away the marble and the hewn stone for their own structures, and leaving only the inner filling up of brickwork, which the ancient architects never designed to be seen. The consequence of all this is, that, except for the lofty and poetical associations connected with it, and except, too, for the immense difference in magnitude, a Roman ruin may be in itself not more picturesque than I have seen an old cellar, with a shattered brick chimney half crumbling down into it, in New England.
By this time I knew not whither I was going, and turned aside from a broad, paved road (it was the Appian Way) into the Via Latina, which I supposed would lead to one of the city gates. It was a lonely path: on my right hand extensive piles of ruin, in strange shapes or shapelessness, built of the broad and thin old Roman bricks, such as may be traced everywhere, when the stucco has fallen away from a modern Roman house; for I imagine there has not been a new brick made here for a thousand years. On my left, I think, was a high wall, and before me, grazing in the road. … [the buffalo calf of the Marble Faun.—ED.]. The road went boldly on, with a well-worn track up to the very walls of the city; but there it abruptly terminated at an ancient, closed-up gateway. From a notice posted against a door, which appeared to be the entrance to the ruins on my left, I found that these were the remains of Columbaria,