It was open on all sides, and seemed to contain neither seats, altars, nor offerings, but it was a light and airy structure, nearly a hundred feet high from its white, glistening floor to the glowing roof, and it stood upon a round, green eminence on the eastern side of the valley. We afterward, however, discovered two others which were in every respect facsimiles of this one; but in neither did we perceive any visitants except flocks of wild doves, which alighted on its lustrous pinnacles. Had the devotees of these temples gone the way of all living, or were the latter merely historical monuments? What did the ingenious builders mean by the globe surrounded with flames? Did they, by this, record any past calamity of _their_ world, or predict any future one of _ours_? I by no means despair of ultimately solving not only these, but a thousand other questions which present themselves respecting the object in this planet; for not the millionth part of her surface has yet been explored, and we have been more desirous of collecting the greatest possible number of new facts than of indulging in speculative theories, however seductive to the imagination. The conclusion of this astounding narrative, which totalled eleven thousand words, was printed on August 31. In the valley of the temple a new set of man-bats was found: We had no opportunity of seeing them actually engaged in any work of industry or art; and, so far as we could judge, they spent their happy hours in collecting various fruits in the woods, in eating, flying, bathing, and loitering about upon the summits of precipices. One night, when the astronomers finished work, they neglectfully left the telescope facing the eastern horizon. The risen sun burned a hole fifteen feet in circumference through the reflecting chamber, and ruined part of the observatory. When the damage was repaired, the moon was invisible, and so Dr. Herschel turned his attention to Saturn. Most of the discoveries here were technical, as the _Sun_ assured its readers, and the narrative came to an end. An editorial note added: This concludes the supplement with the exception of forty pages of illustrative and mathematical notes, which would greatly enhance the size and price of this work without commensurably adding to its general interest. In order that our readers may judge for themselves whether we have withheld from them any matter of general comprehension and interest, we insert one of the notes from those pages of the supplement which we thought it useless to reprint; and it may be considered a fair sample of the remainder. For ourselves, we know nothing of mathematics beyond counting dollars and cents, but to geometricians the following new method of measuring the height of the lunar mountains, adopted by Sir John Herschel, may be quite interesting.