The eye now turns to the north, and the whole length of the Via Flaminia is exposed to view, extending from the Capitoline to the Flaminian gate, perfectly straight, the finest street in Rome, and parallel to the modern Corso. It is the great highway to the north of Italy. Monuments and temples and palaces line this celebrated street. It is spanned by the triumphal arches of Claudius and Marcus Aurelius. To the west of it is the Campus Martius, with its innumerable objects of interest,--the Baths of Agrippa, the Pantheon, the Thermae Alexandrinae, the Column of Marcus Aurelius, and the Mausoleum of Augustus. Beneath the Capitoline on the west, toward the river, is the Circus Flaminius, the Portico of Octavius, the Theatre of Balbus, and the Theatre of Pompey, where forty thousand spectators were accommodated. Stretching beyond the Thermae Alexandrinae, near the Pantheon, is the magnificent bridge which crosses the Tiber, built by Hadrian when he founded his Mausoleum, to which it leads, still standing under the name of the Ponte S. Angelo. The eye takes in eight or nine bridges over the Tiber, some of wood, but generally of stone, of beautiful masonry, and crowned with statues. At the foot of the Capitoline, toward the southwest, are the Portico of Octavius and the Theatre of Marcellus, near the Pons Cestius. Still further southwest, between the Capitoline and the Aventine, in a low valley, are the Velabrum and the Forum Boarium, once a marsh, but now rich in temples and monuments, among which are those of Hercules Fortuna and Mater Matuta. There are no less than four temples consecrated to Hercules in the Forum Boarium, one of the most celebrated places in Rome, devoted to trade and commerce. Beyond still, in the valley between the Palatine and the Aventine, is the great Circus Maximus, founded by the early Tarquin. It is the largest open space inclosed by walls and porticoes in the city. It seats three hundred and eighty-five thousand people. How vast a city, which can spare nearly four hundred thousand of its population to see the chariot-races! Beyond is the Aventine itself. This also is rich in legendary monuments and in the palaces of the great, though originally a plebeian quarter. Here dwelt Trajan, before he was emperor, and Ennius the poet, and Paula, the friend of St. Jerome. Beneath the Aventine, and a little south of the Circus Maximus, west of the Appian Way, are the great baths of Caracalla, the ruins of which, next to those of the Colosseum, made on my mind the strongest impression of any thing that pertains to antiquity, though these were not so large as those of Diocletian. The view south takes in the Caelian Hill, the ancient residence of Tullus Hostilius. The beautiful Temple of Divus Claudius, the Arch of Dolabella, the Macellum Magnum,--a market founded by Nero,--the Castra Peregrina, the Temple of Isis, the Campus Martialis, are among the most conspicuous objects of interest. This hill