...I am at present reading the Duke, and am VERY MUCH interested by him;yet I cannot but think, clever as the whole is, that parts are weak, as when he doubts whether each curvature of the beak of humming-birds is of service to each species. He admits, perhaps too fully, that I have shown the use of each little ridge and shape of each petal in orchids, and how strange he does not extend the view to humming-birds. Still odder, it seems to me, all that he says on beauty, which I should have thought a nonentity, except in the mind of some sentient being. He might have as well said that love existed during the secondary or Palaeozoic periods. Ihope you are getting on with your book better than I am with mine, which kills me with the labour of correcting, and is intolerably dull, though Idid not think so when I was writing it. A naturalist's life would be a happy one if he had only to observe, and never to write.
We shall be in London for a week in about a fortnight's time, and I shall enjoy having a breakfast talk with you.
Yours affectionately, C. DARWIN.
[The following letter refers to the new and improved translation of the 'Origin,' undertaken by Professor Carus:]
CHARLES DARWIN TO J. VICTOR CARUS.
Down, February 17 [1867].
My dear Sir, I have read your preface with care. It seems to me that you have treated Bronn with complete respect and great delicacy, and that you have alluded to your own labour with much modesty. I do not think that any of Bronn's friends can complain of what you say and what you have done. For my own sake, I grieve that you have not added notes, as I am sure that I should have profited much by them; but as you have omitted Bronn's objections, Ibelieve that you have acted with excellent judgment and fairness in leaving the text without comment to the independent verdict of the reader. Iheartily congratulate you that the main part of your labour is over; it would have been to most men a very troublesome task, but you seem to have indomitable powers of work, judging from those two wonderful and most useful volumes on zoological literature ('Bibliotheca Zoologica,' 1861.)edited by you, and which I never open without surprise at their accuracy, and gratitude for their usefulness. I cannot sufficiently tell you how much I rejoice that you were persuaded to superintend the translation of the present edition of my book, for I have now the great satisfaction of knowing that the German public can judge fairly of its merits and demerits...
With my cordial and sincere thanks, believe me, My dear Sir, yours very faithfully, CH. DARWIN.
[The earliest letter which I have seen from my father to Professor Haeckel, was written in 1865, and from that time forward they corresponded (though not, I think, with any regularity) up to the end of my father's life. His friendship with Haeckel was not nearly growth of correspondence, as was the case with some others, for instance, Fritz Muller. Haeckel paid more than one visit to Down, and these were thoroughly enjoyed by my father. The following letter will serve to show the strong feeling of regard which he entertained for his correspondent--a feeling which I have often heard him emphatically express, and which was warmly returned. The book referred to is Haeckel's 'Generelle Morphologie,' published in 1866, a copy of which my father received from the author in January 1867.
Dr. E. Krause ('Charles Darwin und sein Verhaltniss zu Deutschland,' 1885.)has given a good account of Professor Haeckel's services to the cause of Evolution. After speaking of the lukewarm reception which the 'Origin' met with in Germany on its first publication, he goes on to describe the first adherents of the new faith as more or less popular writers, not especially likely to advance its acceptance with the professorial or purely scientific world. And he claims for Haeckel that it was his advocacy of Evolution in his 'Radiolaria' (1862), and at the "Versammlung" of Naturalists at Stettin in 1863, that placed the Darwinian question for the first time publicly before the forum of German science, and his enthusiastic propagandism that chiefly contributed to its success.
Mr. Huxley, writing in 1869, paid a high tribute to Professor Haeckel as the Coryphaeus of the Darwinian movement in Germany. Of his 'Generelle Morphologie,' "an attempt to work out the practical application" of the doctrine of Evolution to their final results, he says that it has the "force and suggestiveness, and...systematising power of Oken without his extravagance." Professor Huxley also testifies to the value of Haeckel's 'Schopfungs-Geschichte' as an exposition of the 'Generelle Morphologie' "for an educated public."
Again, in his 'Evolution in Biology' (An article in the 'Encyclopaedia Britannica,' 9th edition, reprinted in 'Science and Culture,' 1881, page 298.), Mr. Huxley wrote: "Whatever hesitation may, not unfrequently, be felt by less daring minds, in following Haeckel in many of his speculations, his attempt to systematise the doctrine of Evolution, and to exhibit its influence as the central thought of modern biology, cannot fail to have a far-reaching influence on the progress of science."In the following letter my father alludes to the somewhat fierce manner in which Professor Haeckel fought the battle of 'Darwinismus,' and on this subject Dr. Krause has some good remarks (page 162). He asks whether much that happened in the heat of the conflict might not well have been otherwise, and adds that Haeckel himself is the last man to deny this.