September 30, 1862._
My dear Mr. Darwin,--Many thanks for the third edition of the "Origin,"
which I found here on my return from Devonshire on Saturday. I have not
had time yet to read more than the Historical Sketch, which is very
interesting, and shows that the time had quite come for your book.
I am now reading Herbert Spencer's "First Principles," which seems to me
a truly great work, which goes to the root of everything.
I hope you will be well enough to come to Cambridge.
I remain, my dear Mr. Darwin, yours very faithfully,
ALFRED R. WALLACE.
* * * * *
_5 Westbourne Grove Terrace, W. January 14 [1863?]._
My dear Mr. Darwin,--I am very sorry indeed to hear you are still in
weak health. Have you ever tried mountain air? A residence at 2,000 or
3,000 ft. elevation is very invigorating.
I trust your family are now all in good health, and that you may be
spared any anxiety on that score for some time. If you come to town I
shall hope to have the pleasure of seeing you.
I am now in much better health, but find sudden changes of weather
affect me very much, bringing on ague and fever fits.
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