The baths of Diocletian (which I visited to-day), covered an enormous space. They occupied seven years in building, and were the work of _forty thousand Christian slaves, two thirds of whom died of fatigue and misery_! Mounting one of the seven hills of Rome, we come to some half-ruined arches, of enormous size, extending a long distance, in the sides of which were built two modern churches. One was the work of Michael Angelo, and one of his happiest efforts. He has turned two of the ancient halls into a magnificent church, in the shape of a Greek cross, leaving in their places eight gigantic columns of granite. After St. Peter's it is the most imposing church in Rome. We drove thence to the baths of Titus, passing the site of the ancient gardens of Mecænas, in which still stands the tower from which Nero beheld the conflagration of Rome. The houses of Horace and Virgil communicated with this garden, but they are now undistinguishable. We turned up from the Coliseum to the left, and entered a gate leading to the baths of Titus. Five or six immense arches presented their front to us, in a state of picturesque ruin. We took a guide, and a long pole, with a lamp at the extremity, and descended to the subterranean halls, to see the still inimitable frescoes upon the ceilings. Passing through vast apartments, to the ruined walls of which still clung, here and there, pieces of the finely-colored stucco of the ancients, we entered a suite of long galleries, some forty feet high, the arched roofs of which were painted with the most exquisite art, in a kind of fanciful border-work, enclosing figures and landscapes, in as bright colors as if done yesterday. Farther on was the niche in which was found the famous group of Laocoon, in a room belonging to a subterranean palace of the emperor, communicating with the baths. The Belvedere Meleager was also found here. The imagination loses itself in attempting to conceive the splendor of these under-ground palaces, blazing with artificial light, ornamented with works of art, never equalled, and furnished with all the luxury which an emperor of Rome, in the days when the wealth of the world flowed into her treasury, could command for his pleasure. How short life must have seemed to them, and what a tenfold curse became death and the common ills of existence, interrupting or taking away pleasures so varied and inexhaustible.