"Upon that subject," said he, "the Lunarian sages are much divided. Many hypotheses have been suggested on the subject, some of which are very ingenious, and all very fanciful: but the two most celebrated, and into which all the others are now merged, are those of Neerlego and Darcandarca; the former of whom, in a treatise extending to nine quarto volumes, has maintained that the disruption was caused by a comet; and the latter, in a work yet more voluminous, has endeavoured to prove, that when the materials of the moon composed a part of the earth, this planet contained large masses of water, which, though the particles cohered with each other, were disposed to fly off from the earth; and that, by an accumulation of the electric fluid, according to laws which he has attempted to explain, the force was at length sufficient to heave the rocks which encompassed these masses, from their beds, and to project them from the earth, when, partaking of the earth's diurnal motion, they assumed a spherical form, and revolved around it. And further, that because the moon is composed of two sorts of matter, that are differently affected towards the earth in its revolution round that planet, the same parts of its surface always maintain some relative position to us, which thus necessarily causes the singularity of her turning on her axis precisely in the time in which she revolves round the earth." "I see," said I, "that doctors differ and dispute about their own fancies every where." "That is," said he, "because they contend as vehemently for what they imagine as for what they see; and perhaps more so, as their _perceptions_ are like those of other men, while their _reveries_ are more exclusively their own. Thus, in the present instance, the controversy turns upon the mode in which the separation was effected, which affords the widest field for conjecture, while they both agree that such separation has taken place. As to this fact I have not yet made up my mind, though it must be confessed that there is much to give plausibility to their opinion. I recognise, for instance, a striking resemblance between the animal and vegetable productions of Asia and those of the moon." "Do you think, father," said I, "that animal, or even vegetable life, could possibly exist in such a disruption as is supposed?" "Why not?" said he: "you are not to imagine that the shock would be felt in proportion to the mass that was moved. On the contrary, while it would occasion, in some parts, a great destruction of life, it would, in others, not be felt more than an earthquake, or rather, than a succession of earthquakes, during the time that the different parts of the mass were adjusting themselves to a spherical form; whilst a few pairs, or even a single pair of animals, saved in some cavity of a mountain, would be sufficient, in a few centuries, to stock the whole surface of the earth with as many individuals as are now to be found on it.