Part 13
I, who write of him here, had the great privilege of staying with him from time to time at Down, and I find it difficult to record the strangely mixed feeling of reverential admiration and extreme personal attachment and affection with which I came to regard him. I have never known or heard of a man who combined with such exceptional intellectual power so much cheeriness and love of humor, and such ideal kindness, courtesy, and modesty. Owing to the fact that my father was a naturalist and man of letters, I as a boy knew Henslow and Lyell, Darwin's teachers, and have myself enjoyed a naturalist's walk with the one and the geological discussions of the other. I first saw Darwin himself in 1853, when he was recommended to my boyish imagination as "a man who had ridden up a mountain on the back of a tortoise" (in the Galapagos Islands)! When I began to work at and write on zoology he showed his kindness of heart by writing to me in praise of my first book: he wrote to me later in answer to my appeal for guidance, that "physiological experiment on animals is justifiable for real investigation; but not for mere damnable and detestable curiosity. It is a subject which makes me sick with horror, so I will not say another word about it, else I shall not sleep to-night." When I prosecuted Slade the spiritualistic impostor, and obtained his conviction at Bow Street as a common rogue, Darwin was much interested, and after the affair was over wrote to say that he was sure that I had been at great expense in effecting what he considered to be a public benefit, and that he should like to be allowed to contribute ten pounds to the cost of the prosecution. He was ever ready in this way to help by timely gifts of money what he thought to be a good cause, as for instance in the erection of the Zoological Station of Naples by Dr. Anton Dohrn, to which he gave a hundred pounds. His most characteristic minor trait which I remember, was his sitting in his drawing-room at Down in his high-seated arm-chair, and whilst laughing at some story or joke, slapping his thigh with his right hand and exclaiming, with a quite innocent and French freedom of speech, "O my God! That's very good. That's capital." Perhaps one of the most interesting things that I ever heard him say was when, after describing to me an experiment in which he had placed under a bell-jar some pollen from a male flower, together with an unfertilized female flower, in order to see whether, when kept at a distance but under the same jar, the one would act in any way on the other, he remarked:--"That's a fool's experiment. But I love fools' experiments. I am always making them." A great deal might be written as comment on that statement. Perhaps the thoughts which it suggests may be summed up by the proposition that even a wise experiment when made by a fool generally leads to a false conclusion, but that fools' experiments conducted by a genius often prove to be leaps through the dark into great discoveries.
As examples of Darwin's writings I have chosen, in addition to those already mentioned, certain passages from his great book on the 'Origin of Species,' in which he explains what he understands by the terms "Natural Selection" and the "Struggle for Existence." These terms invented by Darwin--but specially the latter--have become "household words." The history of his thoughts on the subject of the Origin of Species is given in the account of his books, written by himself and already referred to. His letter to Professor Asa Gray (September 5th, 1857) is a most valuable brief exposition of his theory and an admirable sample of his correspondence. The distinguished American botanist was one of his most constant correspondents and a dear personal friend.
I have also given as an extract the final pages of the 'Origin of Species,' in which Darwin eloquently defends the view of nature to which his theory leads. A similar and important passage on the subject of 'Creative Design' is also given: it is taken from that wonderful collection of facts and arguments published by Darwin under the title of 'The Variation of Plants and Animals under Domestication.' It cannot be too definitely stated, as Darwin himself insisted, that his theory of the Origin of Species is essentially an extension of the argument used by Lyell in his 'Principles of Geology.' Just as Lyell accounted for the huge masses of stratified rocks, the upheaved mountain chains, the deep valleys, and the shifting seas of the earth's surface, by adducing the long-continued cumulative action of causes which are at this present moment in operation and can be observed and measured at the present day: so Darwin demonstrates that natural variation, and consequent selection by "breeders" and "fanciers" at the present day, give rise to new forms of plants and animals; and that the cumulative, long-continued action of _Natural_ Selection in the Struggle for Existence, or the survival of favorable variations, can and must have effected changes, the magnitude of which is only limited by the length of time during which the process has been going on.
The style of Darwin's writings is remarkable for the absence of all affectation, of all attempt at epigram, literary allusion, or rhetoric. In this it is admirably suited to its subject. At the same time there is no sacrifice of clearness to brevity, nor are technical terms used in place of ordinary language. The greatest pains are obviously given by the author to enable his reader to thoroughly understand the matter in hand. Further, the reader is treated not only with this courtesy of full explanation, but with extreme fairness and modesty. Darwin never slurs over a difficulty nor minimizes it. He states objections and awkward facts prominently, and without shirking proceeds to deal with them by citation of experiment or observation carried out by him for the purpose. His modesty towards his reader is a delightful characteristic. He simply desires to persuade you as one reasonable friend may persuade another. He never thrusts a conclusion nor even a step towards a conclusion upon you, by a demand for your confidence in him as an authority, or by an unfair weighting of the arguments which he balances, or by a juggle of word-play. The consequence is that though Darwin himself thought he had no literary ability, and labored over and re-wrote his sentences, we have in his works a model of clear exposition of a great argument, and the most remarkable example of persuasive style in the English language--persuasive because of its transparent honesty and scrupulous moderation.
Darwin enjoyed rather better health in the last ten years of his life than before, and was able to work and write constantly. For some four months before his death, but not until then, it was evident that his heart was seriously diseased. He died on April 19th, 1882, at the age of seventy-three. Almost his last words were, "I am not the least afraid to die." In 1879 he added to the manuscript of his autobiography already referred to, these words:--"As for myself, I believe that I have acted rightly in steadily following and devoting my life to Science. I feel no remorse from having committed any great sin, but have often and often regretted that I have not done more direct good to my fellow-creatures."
From his early manhood to old age, the desire to do what was right determined the employment of his powers. He has done to his fellow-creatures an imperishable good, in leaving to them his writings and the example of his noble life.
[Illustration: signature of E. Ray Lankester]
IMPRESSIONS OF TRAVEL
From 'A Naturalist's Voyage'
Among the scenes which are deeply impressed on my mind, none exceed in sublimity the primeval forests undefaced by the hand of man; whether those of Brazil, where the powers of Life are predominant, or those of Tierra del Fuego, where Death and Decay prevail. Both are temples filled with the varied productions of the God of Nature; no one can stand in these solitudes unmoved, and not feel that there is more in man than the mere breath of his body. In calling up images of the past, I find that the plains of Patagonia frequently cross before my eyes; yet these plains are pronounced by all wretched and useless. They can be described only by negative characters: without habitations, without water, without trees, without mountains, they support merely a few dwarf plants. Why then--and the case is not peculiar to myself--have these arid wastes taken so firm a hold on my memory? Why have not the still more level, the greener and more fertile pampas, which are serviceable to mankind, produced an equal impression? I can scarcely analyze these feelings; but it must be partly owing to the free scope given to the imagination. The plains of Patagonia are boundless, for they are scarcely passable, and hence unknown; they bear the stamp of having lasted, as they are now, for ages, and there appears no limit to their duration through future time. If, as the ancients supposed, the flat earth was surrounded by an impassable breadth of water, or by deserts heated to an intolerable excess, who would not look at these last boundaries to man's knowledge with deep but ill-defined sensations?
Lastly, of natural scenery, the views from lofty mountains, though certainly in one sense not beautiful, are very memorable. When looking down from the highest crest of the Cordillera, the mind, undisturbed by minute details, was filled with the stupendous dimensions of the surrounding masses.
Of individual objects, perhaps nothing is more certain to create astonishment than the first sight in his native haunt of a barbarian--of man in his lowest and most savage state. One's mind hurries back over past centuries, and then asks: Could our progenitors have been men like these? men whose very signs and expressions are less intelligible to us than those of the domesticated animals; men who do not possess the instinct of those animals, nor yet appear to boast of human reason, or at least of arts consequent on that reason. I do not believe it is possible to describe or paint the difference between savage and civilized man. It is the difference between a wild and tame animal; and part of the interest in beholding a savage is the same which would lead every one to desire to see the lion in his desert, the tiger tearing his prey in the jungle, or the rhinoceros wandering over the wild plains of Africa.
Among the other most remarkable spectacles which we have beheld may be ranked the Southern Cross, the cloud of Magellan, and the other constellations of the southern hemisphere--the water-spout--the glacier leading its blue stream of ice, overhanging the sea in a bold precipice--a lagoon island raised by the reef-building corals--an active volcano--and the overwhelming effects of a violent earthquake. These latter phenomena perhaps possess for me a peculiar interest, from their intimate connection with the geological structure of the world. The earthquake, however, must be to every one a most impressive event: the earth, considered from our earliest childhood as the type of solidity, has oscillated like a thin crust beneath our feet; and in seeing the labored works of man in a moment overthrown, we feel the insignificance of his boasted power.
It has been said that the love of the chase is an inherent delight in man--a relic of an instinctive passion. If so, I am sure the pleasure of living in the open air, with the sky for a roof and the ground for a table, is part of the same feeling; it is the savage returning to his wild and native habits. I always look back to our boat cruises and my land journeys, when through unfrequented countries, with an extreme delight, which no scenes of civilization could have created. I do not doubt that every traveler must remember the glowing sense of happiness which he experienced when he first breathed in a foreign clime, where the civilized man had seldom or never trod.
There are several other sources of enjoyment in a long voyage which are of a more reasonable nature. The map of the world ceases to be a blank; it becomes a picture full of the most varied and animated figures. Each part assumes its proper dimensions; continents are not looked at in the light of islands, or islands considered as mere specks, which are in truth larger than many kingdoms of Europe. Africa, or North and South America, are well-sounding names, and easily pronounced; but it is not until having sailed for weeks along small portions of their shores that one is thoroughly convinced what vast spaces on our immense world these names imply.
From seeing the present state, it is impossible not to look forward with high expectations to the future progress of nearly an entire hemisphere. The march of improvement consequent on the introduction of Christianity throughout the South Sea probably stands by itself in the records of history. It is the more striking when we remember that only sixty years since, Cook, whose excellent judgment none will dispute, could foresee no prospect of a change. Yet these changes have now been effected by the philanthropic spirit of the British nation.
In the same quarter of the globe Australia is rising, or indeed may be said to have risen, into a grand centre of civilization, which at some not very remote period will rule as empress over the southern hemisphere. It is impossible for an Englishman to behold these distant colonies without a high pride and satisfaction. To hoist the British flag seems to draw with it, as a certain consequence, wealth, prosperity, and civilization.
In conclusion, it appears to me that nothing can be more improving to a young naturalist than a journey in distant countries. It both sharpens and partly allays that want and craving which, as Sir J. Herschel remarks, a man experiences although every corporeal sense be fully satisfied. The excitement from the novelty of objects, and the chance of success, stimulate him to increased activity. Moreover, as a number of isolated facts soon become uninteresting, the habit of comparison leads to generalization. On the other hand, as the traveler stays but a short time in each place, his descriptions must generally consist of mere sketches instead of detailed observations. Hence arises, as I have found to my cost, a constant tendency to fill up the wide gaps of knowledge by inaccurate and superficial hypotheses.
But I have too deeply enjoyed the voyage not to recommend any naturalist,--although he must not expect to be so fortunate in his companions as I have been,--to take all chances, and to start, on travels by land if possible, if otherwise on a long voyage. He may feel assured he will meet with no difficulties or dangers, excepting in rare cases, nearly so bad as he beforehand anticipates. In a moral point of view the effect ought to be to teach him good-humored patience, freedom from selfishness, the habit of acting for himself, and of making the best of every occurrence. In short, he ought to partake of the characteristic qualities of most sailors. Traveling ought also to teach him distrust; but at the same time he will discover how many truly kind-hearted people there are with whom he never before had, or ever again will have, any further communication, who yet are ready to offer him the most disinterested assistance.
THE GENESIS OF 'THE ORIGIN OF SPECIES'
From 'Life and Letters'
After several fruitless searches in Surrey and elsewhere, we found this house and purchased it. I was pleased with the diversified appearance of vegetation proper to a chalk district, and so unlike what I had been accustomed to in the Midland counties; and still more pleased with the extreme quietness and rusticity of the place. It is not however quite so retired a place as a writer in a German periodical makes it, who says that my house can be approached only by a mule-track! Our fixing ourselves here has answered admirably in one way which we did not anticipate,--namely, by being very convenient for frequent visits from our children.
Few persons can have lived a more retired life than we have done. Besides short visits to the houses of relations, and occasionally to the seaside or elsewhere, we have gone nowhere. During the first part of our residence we went a little into society, and received a few friends here; but my health almost always suffered from the excitement, violent shivering and vomiting attacks being thus brought on. I have therefore been compelled for many years to give up all dinner parties; and this has been somewhat of a deprivation to me, as such parties always put me into high spirits. From the same cause I have been able to invite here very few scientific acquaintances....
During the voyage of the Beagle I had been deeply impressed by discovering in the Pampean formation great fossil animals, covered with armor like that on the existing armadillos; secondly, by the manner in which closely allied animals replace one another in proceeding southwards over the Continent; and thirdly, by the South-American character of most of the productions of the Galapagos Archipelago, and more especially by the manner in which they differ slightly on each island of the group; none of the islands appearing to be very ancient in a geological sense.
It was evident that such facts as these, as well as many others, could only be explained on the supposition that species gradually become modified; and the subject haunted me. But it was equally evident that neither the action of the surrounding conditions, nor the will of the organisms (especially in the case of plants), could account for the innumerable cases in which organisms of every kind are beautifully adapted to their habits of life; for instance, a woodpecker or a tree-frog to climb trees, or a seed for dispersal by hooks or plumes. I had always been much struck by such adaptations, and until these could be explained it seemed to me almost useless to endeavor to prove by indirect evidence that species have been modified.
After my return to England it appeared to me that by following the example of Lyell in Geology, and by collecting all facts which bore in any way on the variation of animals and plants under domestication and nature, some light might perhaps be thrown on the whole subject. My first note-book was opened in July 1837. I worked on true Baconian principles; and without any theory collected facts on a wholesale scale, more especially with respect to domesticated productions, by printed inquiries, by conversation with skillful breeders and gardeners, and by extensive reading. When I see the list of books of all kinds which I read and abstracted, including whole series of Journals and Transactions, I am surprised at my industry. I soon perceived that selection was the keystone of man's success in making useful races of animals and plants. But how selection could be applied to organisms living in a state of nature, remained for some time a mystery to me.
In October 1838--that is, fifteen months after I had begun my systematic inquiry--I happened to read for amusement 'Malthus on Population'; and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances favorable variations would tend to be preserved, and unfavorable ones to be destroyed. The result of this would be the formation of new species. Here then I had at last got a theory by which to work; but I was so anxious to avoid prejudice that I determined not for some time to write even the briefest sketch of it. In June 1842 I first allowed myself the satisfaction of writing a very brief abstract of my theory in pencil in thirty-five pages; and this was enlarged during the summer of 1844 into one of two hundred and thirty pages, which I had fairly copied out and still possess.
[Illustration: _THE APE-MAN_
Photogravure from a painting by Gabriel Max.
Professor Max has long been known to the greater public through those wonderful pictures in which some tragic fate, some heart-break of mankind, has found expression; but only an inner circle of intimates has known the artist as an able student of nature. He has thought much and deeply upon the existence and origin of things; and his studies in comparative anatomy have given him unusual preparation for the treatment of the present subject. The entire picture is made up of yellowish and brownish-gray tones, expressive of the twilight of the forest. The skin of the female is about the shade of that of the Southern European of to-day; that of the male is darker. The most interesting of the three figures is the young ape-mother, who reclines against a tree-trunk and offers her breast to her first-born. The expression of the face is remarkable; happiness at the possession of the child mingles with misgiving for its future. The tear which trembles upon her cheek seems indicative of the flood of tears which is to run down the history of her descendants. The father has less of this feeling, and stands upright beside his wife and child and looks down upon them with an air of pride and paternal joy. The original painting is owned by the celebrated Darwinian philosopher Ernest Haeckel of Jena.]
But at that time I overlooked one problem of great importance; and it is astonishing to me, except on the principle of Columbus and his egg, how I could have overlooked it and its solution. This problem is the tendency in organic beings descended from the same stock to diverge in character as they become modified. That they have diverged greatly is obvious from the manner in which species of all kinds can be classed under genera, genera under families, families under sub-orders, and so forth: and I can remember the very spot in the road, whilst in my carriage, when to my joy the solution occurred to me; and this was long after I had come to Down. The solution, as I believe, is that the modified offspring of all dominant and increasing forms tend to become adapted to many and highly diversified places in the economy of nature.
Early in 1856 Lyell advised me to write out my views pretty fully, and I began at once to do so on a scale three or four times as extensive as that which was afterwards followed in my 'Origin of Species'; yet it was only an abstract of the materials which I had collected, and I got through about half the work on this scale. But my plans were overthrown, for early in the summer of 1858 Mr. Wallace, who was then in the Malay Archipelago, sent me an essay 'On the Tendency of Varieties to depart Indefinitely from the Original Type'; and this essay contained exactly the same theory as mine. Mr. Wallace expressed the wish that if I thought well of his essay, I should send it to Lyell for perusal.