To prove this great fact and the important results, might be the subject of a large work, and we have heard that Mr. Warden has been engaged in Paris in something of this kind. His work has not yet reached us; but whenever it will be completed, it shall be only one step towards the elucidation of this deep theme. Many facts are yearly evolved in America, new researches undertaken and discoveries made: while in Africa, Lybia, Arabia, Persia, India and even the Oceanic world of Australia and Polynesia, similar discoveries are progressing and new facts made known, that will unfold many new and unexpected analogies with American inquiries. Of the early Monuments of China, Tartary and Thibet, we know little or nothing, and in the very heart of Asia, the real Cradle of Arts and Sciences, if not mankind itself, our learned travellers have not yet penetrated, and the most interesting region of the globe is thus almost unknown to us. This subject is therefore in a progressive state of inquiries, and future ages will yet add thereto: although a number of Ruins and Monuments crumble or disappear under the plough or the leveling energy of men, little respecting these structures of antiquity, enough of unexplored sites will be discovered and surveyed: some of our rudest monuments appear indestructible, the lofty mounds of earth have withstood like the heavy pyramids of Egypt, the lapse of countless ages, some even appear now covered with a dress of new soil, or even diluvial coat, as if they were antediluvian!