a portion of our planet be accounted for? Where is the mighty agent to
rend off such a mass, and throw it to thirty times the earth's diameter?"

"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