We set off an hour after sunrise one radiant morning in a little boat; there was not a cloud in the sky, nor a wave upon the sea, which was so translucent that you could see the hollow caverns clothed with the glaucous sea-moss, and the leaves and branches of those delicate weeds that pave the unequal bottom of the water. As noon approached, the heat, and especially the light, became intense. We passed Posilipo, and came first to the eastern point of the bay of Puzzoli, which is within the great bay of Naples, and which again encloses that of Baiæ. Here are lofty rocks and craggy islets, with arches and portals of precipice standing in the sea, and enormous caverns, which echoed faintly with the murmur of the languid tide. This is called La Scuola di Virgilio. We then went directly across to the promontory of Misenum, leaving the precipitous island of Nisida on the right. Here we were conducted to see the Mare Morto, and the Elysian fields; the spot on which Virgil places the scenery of the Sixth Æneid, Though extremely beautiful, as a lake, and woody hills, and this divine sky must make it, I confess my disappointment. The guide showed us an antique cemetery, where the niches used for placing the cinerary urns of the dead yet remain. We then coasted the bay of Baiæ to the left, in which we saw many picturesque and interesting ruins; but I have to remark that we never disembarked but we were disappointed--while from the boat the effect of the scenery was inexpressibly delightful. The colours of the water and the air breathe over all things here the radiance of their own beauty. After passing the bay of Baiæ, and observing the ruins of its antique grandeur standing like rocks in the transparent sea under our boat, we landed to visit lake Avernus. We passed through the cavern of the Sibyl (not Virgil’s Sibyl), which pierces one of the hills which circumscribe the lake, and came to a calm and lovely basin of water, surrounded by dark woody hills, and profoundly solitary. Some vast ruins of the temple of Pluto stand on a lawny hill on one side of it, and are reflected in its windless mirror. It is far more beautiful than the Elysian fields--but there are all the materials for beauty in the latter, and the Avernus was once a chasm of deadly and pestilential vapours. About half a mile from Avernus, a high hill, called Monte Novo, was thrown up by volcanic fire.