"His wife the town forsook, And in the woods that clothe Ariccia's vale lies hid." _Met._ xv. 487. "There, at the mountain's base, all drowned in tears, She lay, till chaste Diana on her woe Compassion took: her altered form became A limpid fount; her beauteous limbs dissolved, And in perennial waters melt away." _Met._ xv. 548. "O'er their rough bed hoarse-murmuring waters move; A pure but scanty draught is there supplied; Egeria's fount, whom all the muses love, Sage Numa's counsellor, his friend, and bride." _Fasti_, iii. 273. After two miles of a picturesque and shady road, crossing four viaducts, and commanding beautiful views, we arrive at GENZANO. Its excellent wine is renowned, and this, together with its flowers and beautiful situation, are its sole attractions. The flower festival, held the eighth day after Corpus Christi, is fully described in "The Improvisatore." _Up a path_ by the side of the Palazzo Cesarini we obtain a fine view of the LAKE NEMI, which occupies an extinct crater. The lake is three miles in circumference, and 300 feet deep, and passes out by an artificial _emissarium_, made by Trajan. The water is calm and marvellously clear. Trajan erected on this lake a floating palace, 500 feet in length, 270 feet in breadth, and 60 feet deep. It was of wood, joined with bronze nails, and lead plated outside; the inside was lined with marble, and the ceilings were of bronze. The water for use and ornament was supplied from the Fount Juturna by means of pipes. Signor Marchi, a Roman, in 1535 descended in a diving-bell and explored this curious palace, which had sunk beneath the waters. He left an account of his discoveries. (See Brotier's "Tacitus," Sup. Ap., and Notes on Trajan.) A large fragment of the wood-work is preserved in the Kircherian Museum. _On the opposite side_ is the small medieval town of NEMI, picturesquely situated upon a hill above the lake. On the sides of the lake are the remains of villas built of _opus reticulatum_; and in the sixteenth century some of the wood-work, tiles, &c., of Cæsar's Villa--begun, but afterwards pulled down because it did not suit his taste--were found, and are preserved in the Library of the Vatican. "Lo, Nemi! navelled in thy woody hills So far, that the uprooting wind which tears The oak from his foundations, and which spills The ocean o'er its boundary, and bears Its foam against the skies, reluctant spares The oval mirror of thy glassy lake; And, calm as cherished hate, its surface wears A deep, cold, settled aspect naught can shake, All coiled into itself and round, as sleeps the snake."--BYRON. THE TEMPLE OF DIANA NEMORENSE.