"We have had the full of the moon and a cloudless sky for the last two or three nights, and of course we have walked the ravine till the 'small hours,' seeing with wonder the transforming effects of moonlight and its black shadows on the falls and precipices. I have no idea (you will be glad to know) of trying to reproduce these sublimities on paper--at least not with my travelling stock of verbs and adjectives. To 'sandwich the moon in a muffin,' one must have time and a ladder of dictionaries. But one or two effects struck me which perhaps are worth briefly naming, and I will throw into the lot a poetical figure, which you may use in your next song.... "The fourth Fall, (or the one that is flanked by the ruins of a saw-mill) is, perhaps, a hundred feet across; and its curve over the upper rock and its break upon the lower one, form two parallel lines, the water everywhere falling the same distance with the evenness of an artificial cascade. The stream not being very full, just now, it came over, in twenty or thirty places, thicker than elsewhere; and the effect, from a distance, as the moonlight lay full upon it, was that of twenty or thirty immovable marble columns connected by transparent curtains of falling lace, and with bases in imitation of foam. Now it struck me that this might suggest a new and fanciful order of architecture, suitable at least to the structure of green-houses, the glass roofs of which are curved over and slope to the ground with very much the contour of a waterfall.... "Subterranean as this foaming river looks by day, it looks like a river in cloud-land by night. The side of the ravine which is in shadow, is one undistinguishable mass of black, with its wavy upper edge in strong relief against the sky, and, as the foaming stream catches the light from the opposite and moonlit side, it is outlined distinctly on its bed of darkness, and seems winding its way between hills of clouds, half black, half luminous. Below, where all is deep shadow except the river, you might fancy it a silver mine laid open to your view amid subterranean darkness by the wand of an enchanter, or (if you prefer a military trope, my dear General), a long white plume laid lengthwise between the ridges of a cocked hat." [Illustration] NEW PROOF OF THE EARTH'S ROTATION.