yellow Tiber--winding through the valley as far as eye could follow. Here we waited for the train, which was ten minutes late, and tried to make up for lost time by leaving our luggage, all duly marked and ready, standing on the track. We soon began to greet familiar sites as we flitted by: the last we made out plainly was Borghetto, a handful of houses, with a ruined castle keeping watch on a hill hard by: then twilight gathered, and we strained our eyes in vain for the earliest glimpse of Mount Soracte, and night came down before we could descry the first landmarks of the Agro Romano, the outposts of our excursions, the farm-towers we knew by name, the farthest fragments of the aqueducts. But it was not so obscure that we could not discern the Tiber between his low banks showing us the way, the lights quivering in the Anio as the train rushed over the bridge; and when at length we saw against the clear night-sky a great dark barrier stretching right and left, we knew that the walls of Rome were once more before us: in a moment we had glided through with slackening speed, and her embrace enfolded us again. [Illustration: THE TIBER, FROM ORTE.] [Illustration: BORGHETTO.] [Illustration: ST. PETER'S AND THE VATICAN, FROM THE FALLS OF THE TIBER.] The Tiber, winding as it does like a great artery through the heart of Rome, is seldom long either out of sight or mind. One constantly comes upon it in the most unexpected manner, for there is no river front to the city. There is a wide open space on the Ripetta--a street which runs from the Piazza del Popolo, at the head of the foreign quarter, to remoter parts--where a broad flight of marble steps descends to the level of the flood, and a ferry crosses to the opposite bank: looking over at the trees and fields, it is like the open country, yet beyond are St. Peter's and the Vatican, and the whole of what is known as the Leonine City. But one cannot follow the Tiber through the streets of Rome as one may the Seine in Paris: in the thickly-built quarters the houses back upon the stream and its yellow waves wash their foundations, working wrath and woe from time to time, as those who were there in the winter of 1870 will recollect. Sometimes it is lost to sight for half a mile together, unless one catches a glimpse of it through the carriage-way of a palace. From the wharf of the Ripetta it disappears until you come upon it again at the bridge of St. Angelo, the Ælian bridge of ancient Rome, which is the most direct passage from the fashionable and foreign quarter to the Trastevere. It must be confessed that the idle sense of mere pleasure generally supersedes recollection and association after one's first astonishment to find one's self among the historic places subsides; yet how often, as our horses' hoofs rang on the slippery stones, my thoughts went suddenly back to the scene when Saint Gregory passed over, chanting litanies, at the head of the whole