“We felt but little fatigue from our rough, clambering walk of some twenty miles, until we emerged from the cave, and came in contact with outer air. After breathing the air of the cave from eight A. M. till five P. M., the atmosphere seemed very impure. We could smell every tree, and plant, and old log; and the air was so sultry and sickening, that we had to rest awhile at the mouth before starting for the hotel, some fifty rods distant. “I have thus attempted to redeem my promise in regard to writing you from the cave. I had no thought of writing at so great length. If the cave were possessed of mind and sensibility, I would take off my hat to it, and feelingly ask its pardon for the great injustice I have done it in these letters. But as it is, I will only say that I have over and over again assented to the truthfulness and justice of my guide Alfred’s idea of all descriptions of the cave: ‘Writin don’t do no good. If anybody wants to know how the cave looks, they must come and see it.’ And I can not conceive of any journey for this purpose so long and toilsome, that those making it would not be abundantly compensated for their pains, by a view of this wonderful work of a wonder-working God.” Still another visitor, writing to a friend in Europe, says of this wonderful cave, “I had heard and read descriptions of it, long since; but the half, the quarter, was not told. Its vastness, its lofty arches, its immense reach into the bosom of the solid earth, fill me with astonishment. It is, like Mont Blanc, Chimborazo, and the falls of Niagara, one of God’s mightiest works. Shall I compare it with anything of a similar description, which you have seen on the other side of the Atlantic? with the grotto of Neptune, or that of the Sibyl, at Tivoli, or with any of Virgil’s poetic Italian machinery? No comparison can be instituted. I speak, as you are aware, from personal knowledge. You, seated on the opposite bank of the Arno, have seen me clamber up, from the noisy waters below, to the entrance of the far-famed grotto of Neptune, which I leisurely explored. In point of capaciousness, that grotto has little more to boast of than the cellar of a large hotel, and, like that, was, as I think, excavated by human hands. That of the Tiburtine Sibyl is still more limited in its dimensions. Indeed, every cavern which I have ever seen, if placed along side of this, would dwindle into insignificance.”