The structure terminates above in a double dome, whose figure may be imagined by supposing a small acorn set on the truncated top of a large one, (the horizontal diameter of both being considerably longer in proportion to the perpendicular than is common with that fruit,) and each of these domes is surrounded by a row of prism-shaped pillars, half column, half buttress in their effect, somewhat similar to the exquisite columnar _entourage_ of the central cylinder of the leaning tower of Pisa. The result of this arrangement is an aerial, yet massive beauty, without parallel in the architecture of the world. I have not conveyed to any mind an idea of the grandeur of this pile, nor could I, even with the assistance of a diagram. I can only say that the Cathedral Buttes are a lesson for the architects of all Christendom,--a purely novel and original creation, of such marvellous beauty that Bierstadt and I simultaneously exclaimed,--"Oh that the master-builders of the world could come here even for a single day! The result would be an entirely new style of architecture,--an American school, as distinct from all the rest as the Ionic from the Gothic or Byzantine." If they could come, the art of building would have a regeneration. "Amazing" is the only word for this glorious work of Nature. I could have bowed down with awe and prayed at one of its vast, inimitable doorways, but that the mystery of its creation, and the grotesqueness of even its most glorious statues, made one half dread lest it were some temple built by demon-hands for the worship of the Lord of Hell, and sealed in the stone-dream of petrifaction, with its priests struck dumb within it, by the hand of God, to wait the judgment of Eblis and the earthquakes of the Last Day.