As we now rapidly approached the moon the change which the appearance of its surface underwent was no less wonderful than that which the surface of the earth had presented in the reverse order while we were receding from it. From a pale silver orb, shining with comparative faintness among the stars, it slowly assumed the appearance of a vast mountainous desert. As we drew nearer its colors became more pronounced; the great flat regions appeared darker; the mountain peaks shone more brilliantly. The huge chasms seemed bottomless and blacker than midnight. Gradually separate mountains appeared. What seemed like expanses of snow and immense glaciers streaming down their sides sparkled with great brilliancy in the perpendicular rays of the sun. Our motion had now assumed the aspect of falling. We seemed to be dropping from an immeasurable height, and with an inconceivable velocity, straight down upon those giant peaks. Here and there curious lights glowed upon the mysterious surface of the moon. Where the edge of the moon cut the sky behind it, it was broken and jagged with mountain masses. Vast crater rings overspread its surface, and in some of these I imagined I could perceive a lurid illumination coming out of their deepest cavities, and the curling of mephitic vapors around their terrible jaws. We were approaching that part of the moon which is known to the astronomers as the Bay of Rainbows. Here a huge semi-circular region, as smooth almost as the surface of a prairie, lay beneath our eyes, stretching southward into a vast ocean-like expanse, while on the north it was enclosed by an enormous range of mountain cliffs, rising perpendicularly to a height of many thousands of feet, and rent and gashed in every direction by forces which seemed at some remote period to have labored at tearing this little world in pieces. It was a fearful spectacle; a dead and mangled world, too dreadful to look upon. The idea of the death of the moon was, of course, not a new one to many of us. We had long been aware that the earth's satellite was a body which had passed beyond the stage of life, if indeed it had ever been a life supporting globe; but none of us were prepared for the terrible spectacle which now smote our eyes. At each end of the semi-circular ridge that encloses the Bay of Rainbows there is a lofty promontory. That at the northwestern extremity had long been known to the astronomers under the name of Cape Laplace. The other promontory, at the southeastern termination, is called Cape Heraclides. It was toward the latter that we were approaching, and by interchange of signals all the members of the squadron had been informed that Cape Heraclides was to be our rendezvous upon the moon.