in the Library of Trinity College.) from Whewell, merely as showing that he
is not horrified with us. You can return it whenever you have occasion to
write, so as not to waste your time.

C.D.


CHARLES DARWIN TO C. LYELL.
Down, [January 4th? 1860].

...I have had a brief note from Keyserling (Joint author with Murchison of
the 'Geology of Russia,' 1845.), but not worth sending you. He believes in
change of species, grants that natural selection explains well adaptation
of form, but thinks species change too regularly, as if by some chemical
law, for natural selection to be the sole cause of change. I can hardly
understand his brief note, but this is I think the upshot.

...I will send A. Murray's paper whenever published. (The late Andrew
Murray wrote two papers on the 'Origin' in the Proc. R. Soc. Edin. 1860.
The one referred to here is dated January 16, 1860. The following is
quoted from page 6 of the separate copy: "But the second, and, as it
appears to me, by much the most important phase of reversion to type (and
which is practically, if not altogether ignored by Mr. Darwin), is the
instinctive inclination which induces individuals of the same species by
preference to intercross with those possessing the qualities which they
themselves want, so as to preserve the purity or equilibrium of the
breed...It is trite to a proverb, that tall men marry little women...a man
of genius marries a fool...and we are told that this is the result of the
charm of contrast, or of qualities admired in others because we do not
possess them. I do not so explain it. I imagine it is the effort of