Let us suppose, then, that the inhabitants of the moon, by astonishing advancement in science, and by profound insight into that lunar philosophy, the mere flickerings of which have of late years dazzled the feeble optics, and addled the shallow brains of the good people of our globe,—let us suppose, I say, that the inhabitants of the moon, by these means, had arrived at such a command of their _energies_, such an enviable state of _perfectibility_, as to control the elements, and navigate the boundless regions of space. Let us suppose a roving crew of these soaring philosophers, in the course of an aërial voyage of discovery among the stars, should chance to alight upon this outlandish planet. [Illustration: THE HEADLESS MEN OF THE MOON VISIT US.] And here I beg my readers will not have the uncharitableness to smile, as is too frequently the fault of volatile readers, when perusing the grave speculations of philosophers. I am far from indulging in any sportive vein at present; nor is the supposition I have been making so wild as many may deem it. It has long been a very serious and anxious question with me, and many a time and oft, in the course of my overwhelming cares and contrivances for the welfare and protection of this my native planet, have I lain awake whole nights debating in my mind, whether it were most probable we should first discover and civilize the moon, or the moon discover and civilize our globe. Neither would the prodigy of sailing in the air and cruising among the stars be a whit more astonishing and incomprehensible to us than was the European mystery of navigating floating castles, through the world of waters, to the simple natives. We have already discovered the art of coasting along the aërial shores of our planet, by means of balloons, as the savages had of venturing along their sea-coasts in canoes; and the disparity between the former and the aërial vehicles of the philosophers from the moon might not be greater than that between the bark canoes of the savages and the mighty ships of their discoverers. I might here pursue an endless chain of similar speculations; but as they would be unimportant to my subject, I abandon them to my reader, particularly if he be a philosopher, as matters well worthy of his attentive consideration.