Figure to yourself a mound of earth, about twelve feet high (some have been discovered measuring twenty), which, from a distance, might easily be mistaken for a negro's hut. Approach it, and you will at once detect that it is the product of a higher art. Its curious form is that of a pointed dome; or, if you like, of an obtuse and preponderating obelisk. For support, the dome or obelisk has four, five, or six cupolas from five to six feet high; and against these are propped up below some small bell-like structures, nearly two feet in elevation. The whole might well be taken for a kind of Oriental cathedral, the principal spire of which had a double cincture of minarets, decreasing in height; the said whole being of extreme solidity, and composed of a compact clay, which, when burnt, makes the best bricks. Not only may several men stand upon it without injury, but even the wild bull's station themselves on its summit as sentinels to watch, through the high grasses of the plain, that the lion or panther does not surprise the herd. Nevertheless, this dome is hollow, and the inferior platform which supports it is itself supported by a semi-hollow construction formed by the junction of four arches (two to three feet in span),--arches of a very substantial design, being pointed, ogival, and in a kind of Gothic style. Lower still extends a number of passages or corridors, plastered spaces which one might call saloons, and finally, convenient, spacious, and healthy lodgings, capable of receiving a large population; in brief, quite a subterranean city. A broad spiral passage winds and rises gradually in the thickness of the edifice, which has no opening, no door, no window; the vomitories are disguised and at a distance, terminating afar in the plain. It is the most considerable and important work which displays the genius of insects; a labour of infinite patience and of daring art. We must not forget that these walls, which time has hardened, were very friable at first, and always crumbling. To raise this Titanic edifice to such a height, a continuity of effort was absolutely requisite, and a succession of provisional constructions, demolished one after the other when they had served their purpose. The masons commenced with the exterior pyramids, a foot and a foot and a half in height; then with those of the second rank. But the latter being solid and indurated, they intrepidly undermined their base to make room for the passages, the windows, and the spiral staircase. The same operation was carried out beneath the dome, which was excavated with great labour, and in such a manner that the great hollow vault, in conjunction with its lower platform, rested on the narrow vaults of the four arches forming the centre and foundation of the edifice.