Thanks for AdeC’s Histoire des sciences .
Sends a copy of Expression.
His health keeps him weak; he dreads grappling with the fearful subject of variation [in nature]
so he is working up some observations in botanical physiology to publish with his old papers on climbing plants.
Down, | Beckenham, Kent.
My dear Sir
I am much obliged for your great kindness in having sent me your“Histoire des Sciences &c”.f2 From what I see of the contents I lookforward with real eagerness to read it; but I shall not be ableto begin for a week or two. I have just published a small book onExpression, which I did not suppose you would care to see; but from thenature of your recent studies, parts may possibly interest you, so I havetold my Publisher to send you a copy.f3
My health keeps very weak & I dread the exertion of grappling withthe fearful subject of variation; so I am now employed in working upsome observations in Botanical physiology made twelve years ago, which Iintend publishing with some other new matter & some of my old paperson Climbing Plants, Dimorphism &c in a volume.—f4
With cordial thanks & sincere respect, Pray | believe me | Yours veryfaithfully | Charles Darwin