Life and Letters of Charles Darwin Volume I Part 27

October 1846 to October 1854.

[Writing to Sir J.D. Hooker in 1845, my father says: "I hope this next summer to finish my South American Geology, then to get out a little Zoology, and hurrah for my species work..." This pa.s.sage serves to show that he had at this time no intention of making an exhaustive study of the Cirripedes. Indeed it would seem that his original intention was, as I learn from Sir J.D. Hooker, merely to work out one special problem. This is quite in keeping with the following pa.s.sage in the Autobiography: "When on the coast of Chile, I found a most curious form, which burrowed into the sh.e.l.ls of Concholepas, and which differed so much from all other Cirripedes that I had to form a new sub-order for its sole reception...To understand the structure of my new Cirripede I had to examine and dissect many of the common forms; and this gradually led me on to take up the whole group." In later years he seems to have felt some doubt as to the value of these eight years of work,--for instance when he wrote in his Autobiography--"My work was of considerable use to me, when I had to discuss in the 'Origin of Species,' the principles of a natural cla.s.sification. Nevertheless I doubt whether the work was worth the consumption of so much time." Yet I learn from Sir J.D. Hooker that he certainly recognised at the time its value to himself as systematic training. Sir Joseph writes to me: "Your father recognised three stages in his career as a biologist: the mere collector at Cambridge; the collector and observer in the "Beagle", and for some years afterwards; and the trained naturalist after, and only after the Cirripede work. That he was a thinker all along is true enough, and there is a vast deal in his writings previous to the Cirripedes that a trained naturalist could but emulate...He often alluded to it as a valued discipline, and added that even the 'hateful'

work of digging out synonyms, and of describing, not only improved his methods but opened his eyes to the difficulties and merits of the works of the dullest of cataloguers. One result was that he would never allow a depreciatory remark to pa.s.s unchallenged on the poorest cla.s.s of scientific workers, provided that their work was honest, and good of its kind. I have always regarded it as one of the finest traits of his character,--this generous appreciation of the hod-men of science, and of their labours...and it was monographing the Barnacles that brought it about."]

Professor Huxley allows me to quote his opinion as to the value of the eight years given to the Cirripedes:--

"In my opinion your sagacious father never did a wiser thing than when he devoted himself to the years of patient toil which the Cirripede-book cost him.

"Like the rest of us, he had no proper training in biological science, and it has always struck me as a remarkable instance of his scientific insight, that he saw the necessity of giving himself such training, and of his courage, that he did not s.h.i.+rk the labour of obtaining it.

"The great danger which besets all men of large speculative faculty, is the temptation to deal with the accepted statements of facts in natural science, as if they were not only correct, but exhaustive; as if they might be dealt with deductively, in the same way as propositions in Euclid may be dealt with. In reality, every such statement, however true it may be, is true only relatively to the means of observation and the point of view of those who have enunciated it. So far it may be depended upon. But whether it will bear every speculative conclusion that may be logically deduced from it, is quite another question.

"Your father was building a vast superstructure upon the foundations furnished by the recognised facts of geological and biological science.

In Physical Geography, in Geology proper, in Geographical Distribution, and in Palaeontology, he had acquired an extensive practical training during the voyage of the "Beagle". He knew of his own knowledge the way in which the raw materials of these branches of science are acquired, and was therefore a most competent judge of the speculative strain they would bear. That which he needed, after his return to England, was a corresponding acquaintance with Anatomy and Development, and their relation to Taxonomy--and he acquired this by his Cirripede work.

"Thus, in my apprehension, the value of the Cirripede monograph lies not merely in the fact that it is a very admirable piece of work, and const.i.tuted a great addition to positive knowledge, but still more in the circ.u.mstance that it was a piece of critical self-discipline, the effect of which manifested itself in everything your father wrote afterwards, and saved him from endless errors of detail.

"So far from such work being a loss of time, I believe it would have been well worth his while, had it been practicable, to have supplemented it by a special study of embryology and physiology. His hands would have been greatly strengthened thereby when he came to write out sundry chapters of the 'Origin of Species.' But of course in those days it was almost impossible for him to find facilities for such work."

No one can look a the two volumes on the recent Cirripedes, of 399 and 684 pages respectively (not to speak of the volumes on the fossil species), without being struck by the immense amount of detailed work which they contain. The forty plates, some of them with thirty figures, and the fourteen pages of index in the two volumes together, give some rough idea of the labour spent on the work. (The reader unacquainted with Zoology will find some account of the more interesting results in Mr. Romanes' article on "Charles Darwin" ('Nature' Series, 1882).) The state of knowledge, as regards the Cirripedes, was most unsatisfactory at the time that my father began to work at them. As an ill.u.s.tration of this fact, it may be mentioned that he had even to re-organise the nomenclature of the group, or, as he expressed it, he "unwillingly found it indispensable to give names to several valves, and to some few of the softer parts of Cirripedes." (Vol. i. page 3.) It is interesting to learn from his diary the amount of time which he gave to different genera. Thus the genus Chthamalus, the description of which occupies twenty-two pages, occupied him for thirty-six days; Coronula took nineteen days, and is described in twenty-seven pages. Writing to Fitz-Roy, he speaks of being "for the last half-month daily hard at work in dissecting a little animal about the size of a pin's head, from the Chonos archipelago, and I could spend another month, and daily see more beautiful structure."

Though he became excessively weary of the work before the end of the eight years, he had much keen enjoyment in the course of it. Thus he wrote to Sir J.D. Hooker (1847?):--"As you say, there is an extraordinary pleasure in pure observation; not but what I suspect the pleasure in this case is rather derived from comparisons forming in one's mind with allied structures. After having been so long employed in writing my old geological observations, it is delightful to use one's eyes and fingers again." It was, in fact, a return to the work which occupied so much of his time when at sea during his voyage. His zoological notes of that period give an impression of vigorous work, hampered by ignorance and want of appliances. And his untiring industry in the dissection of marine animals, especially of Crustacea, must have been of value to him as training for his Cirripede work. Most of his work was done with the simple dissecting microscope--but it was the need which he found for higher powers that induced him, in 1846, to buy a compound microscope. He wrote to Hooker:--"When I was drawing with L., I was so delighted with the appearance of the objects, especially with their perspective, as seen through the weak powers of a good compound microscope, that I am going to order one; indeed, I often have structures in which the 1/30 is not power enough."

During part of the time covered by the present chapter, my father suffered perhaps more from ill-health than at any other time of his life. He felt severely the depressing influence of these long years of illness; thus as early as 1840 he wrote to Fox: "I am grown a dull, old, spiritless dog to what I used to be. One gets stupider as one grows older I think." It is not wonderful that he should so have written, it is rather to be wondered at that his spirit withstood so great and constant a strain. He wrote to Sir J.D. Hooker in 1845: "You are very kind in your enquiries about my health; I have nothing to say about it, being always much the same, some days better and some worse. I believe I have not had one whole day, or rather night, without my stomach having been greatly disordered, during the last three years, and most days great prostration of strength: thank you for your kindness; many of my friends, I believe, think me a hypochondriac."

Again, in 1849, he notes in his diary:--"January 1st to March 10th.--Health very bad, with much sickness and failure of power. Worked on all well days." This was written just before his first visit to Dr.

Gully's Water-Cure Establishment at Malvern. In April of the same year he wrote:--"I believe I am going on very well, but I am rather weary of my present inactive life, and the water-cure has the most extraordinary effect in producing indolence and stagnation of mind: till experiencing it, I could not have believed it possible. I now increase in weight, have escaped sickness for thirty days." He returned in June, after sixteen weeks' absence, much improved in health, and, as already described, continued the water-cure at home for some time.]

CHARLES DARWIN TO J.D. HOOKER. Down [October, 1846].

My dear Hooker,

I have not heard from Sulivan (Admiral Sir B.J. Sulivan, formerly an officer of the "Beagle".) lately; when he last wrote he named from 8th to 10th as the most likely time. Immediately that I hear, I will fly you a line, for the chance of your being able to come. I forget whether you know him, but I suppose so; he is a real good fellow. Anyhow, if you do not come then, I am very glad that you propose coming soon after...

I am going to begin some papers on the lower marine animals, which will last me some months, perhaps a year, and then I shall begin looking over my ten-year-long acc.u.mulation of notes on species and varieties, which, with writing, I dare say will take me five years, and then, when published, I dare say I shall stand infinitely low in the opinion of all sound Naturalists--so this is my prospect for the future.

Are you a good hand at inventing names. I have a quite new and curious genus of Barnacle, which I want to name, and how to invent a name completely puzzles me.

By the way, I have told you nothing about Southampton. We enjoyed (wife and myself) our week beyond measure: the papers were all dull, but I met so many friends and made so many new acquaintances (especially some of the Irish Naturalists), and took so many pleasant excursions. I wish you had been there. On Sunday we had so pleasant an excursion to Winchester with Falconer (Hugh Falconer, 1809-1865. Chiefly known as a palaeontologist, although employed as a botanist during his whole career in India, where he was also a medical officer in the H.E.I.C. Service; he was superintendent of the Company's garden, first at Saharunpore, and then at Calcutta. He was one of the first botanical explorers of Kashmir. Falconer's discoveries of Miocene mammalian remains in the Sewalik Hills, were, at the time, perhaps the greatest "finds" which had been made. His book on the subject, 'Fauna Antiqua Sivalensis,' remained unfinished at the time of his death.), Colonel Sabine (The late Sir Edward Sabine, formerly President of the Royal Society, and author of a long series of memoirs on Terrestrial Magnetism.), and Dr. Robinson (The late Dr. Thomas Romney Robinson, of the Armagh Observatory.), and others. I never enjoyed a day more in my life. I missed having a look at H. Watson. (The late Hewett Cottrell Watson, author of the 'Cybele Britannica,' one of a most valuable series of works on the topography and geographical distribution of the plants of the British Islands.) I suppose you heard that he met Forbes and told him he had a severe article in the Press. I understood that Forbes explained to him that he had no cause to complain, but as the article was printed, he would not withdraw it, but offered it to Forbes for him to append notes to it, which Forbes naturally declined...

CHARLES DARWIN TO J.D. HOOKER. Down, April 7th [1847?].

My dear Hooker,

I should have written before now, had I not been almost continually unwell, and at present I am suffering from four boils and swellings, one of which hardly allows me the use of my right arm, and has stopped all my work, and damped all my spirits. I was much disappointed at missing my trip to Kew, and the more so, as I had forgotten you would be away all this month; but I had no choice, and was in bed nearly all Friday and Sat.u.r.day. I congratulate you over your improved prospects about India (Sir J. Hooker left England on November 11, 1847, for his Himalayan and Tibetan journey. The expedition was supported by a small grant from the Treasury, and thus a.s.sumed the character of a Government mission.), but at the same time must sincerely groan over it. I shall feel quite lost without you to discuss many points with, and to point out (ill-luck to you) difficulties and objections to my species hypotheses. It will be a horrid shame if money stops your expedition; but Government will surely help you to some extent...Your present trip, with your new views, amongst the coal-plants, will be very interesting.

If you have spare time, BUT NOT WITHOUT, I should enjoy having some news of your progress. Your present trip will work well in, if you go to any of the coal districts in India. Would this not be a good object to parade before Government; the utilitarian souls would comprehend this.

By the way, I will get some work out of you, about the domestic races of animals in India...

CHARLES DARWIN TO L. JENYNS (BLOMEFIELD). Down [1847].

Dear Jenyns,

("This letter relates to a small Almanack first published in 1843, under the name of 'The Naturalists' Pocket Almanack,' by Mr. Van Voorst, and which I edited for him. It was intended especially for those who interest themselves in the periodic phenomena of animals and plants, of which a select list was given under each month of the year.

"The Pocket Almanack contained, moreover, miscellaneous information relating to Zoology and Botany; to Natural History and other scientific societies; to public Museums and Gardens, in addition to the ordinary celestial phenomena found in most other Almanacks. It continued to be issued till 1847, after which year the publication was abandoned."--From a letter from Rev. L. Blomefield to F. Darwin.)

I am very much obliged for the capital little Almanack; it so happened that I was wis.h.i.+ng for one to keep in my portfolio. I had never seen this kind before, and shall certainly get one for the future. I think it is very amusing to have a list before one's eyes of the order of appearance of the plants and animals around one; it gives a fresh interest to each fine day. There is one point I should like to see a little improved, viz., the correction for the clock at shorter intervals. Most people, I suspect, who like myself have dials, will wish to be more precise than with a margin of three minutes. I always buy a s.h.i.+lling almanack for this SOLE end. By the way, YOURS, i.e., Van Voorst's Almanack, is very dear; it ought, at least, to be advertised post-free for the s.h.i.+lling. Do you not think a table (not rules) of conversion of French into English measures, and perhaps weights, would be exceedingly useful; also centigrade into Fahrenheit,--magnifying powers according to focal distances?--in fact you might make it the more useful publication of the age. I know what I should like best of all, namely, current meteorological remarks for each month, with statement of average course of winds and prediction of weather, in accordance with movements of barometer. People, I think, are always amused at knowing the extremes and means of temperature for corresponding times in other years.

I hope you will go on with it another year. With many thanks, my dear Jenyns,

Yours very truly, CHARLES DARWIN.

CHARLES DARWIN TO J.D. HOOKER. Down, Sunday [April 18th, 1847].

My dear Hooker,

I return with many thanks Watson's letter, which I have had copied. It is a capital one, and I am extremely obliged to you for obtaining me such valuable information. Surely he is rather in a hurry when he says intermediate varieties must almost be necessarily rare, otherwise they would be taken as the types of the species; for he overlooks numerical frequency as an element. Surely if A, B, C were three varieties, and if A were a good deal the commonest (therefore, also, first known), it would be taken as the type, without regarding whether B was quite intermediate or not, or whether it was rare or not. What capital essays W would write; but I suppose he has written a good deal in the 'Phytologist.' You ought to encourage him to publish on variation; it is a shame that such facts as those in his letter should remain unpublished. I must get you to introduce me to him; would he be a good and sociable man for Dropmore? (A much enjoyed expedition made from Oxford--when the British a.s.sociation met there in 1847.) though if he comes, Forbes must not (and I think you talked of inviting Forbes), or we shall have a glorious battle. I should like to see sometime the war correspondence. Have you the 'Phytologist,' and could you sometime spare it? I would go through it quickly...I have read your last five numbers (Of the Botany of Hooker's 'Antarctic Voyage.'), and as usual have been much interested in several points, especially with your discussions on the beech and potato. I see you have introduced several sentences against us Trans.m.u.tationists. I have also been looking through the latter volumes of the 'Annals of Natural History,' and have read two such soulless, pompous papers of --, quite worthy of the author...The contrast of the papers in the "Annals" with those in the "Annales"

is rather humiliating; so many papers in the former, with short descriptions of species, without one word on their affinities, internal structure, range or habits. I am now reading --, and I have picked out some things which have interested me; but he strikes me as rather dullish, and with all his Materia Medica smells of the doctor's shop. I shall ever hate the name of the Materia Medica, since hearing Duncan's lectures at eight o'clock on a winter's morning--a whole, cold breakfastless hour on the properties of rhubarb!

I hope your journey will be very prosperous. Believe me, my dear Hooker,

Ever yours, C. DARWIN.

P.S.--I think I have only made one new acquaintance of late, that is R. Chambers; and I have just received a presentation copy of the sixth edition of the 'Vestiges.' Somehow I now feel perfectly convinced he is the author. He is in France, and has written to me thence.

CHARLES DARWIN TO J.D. HOOKER. Down [1847?].

...I am delighted to hear that Brongniart thought Sigillaria aquatic, and that Binney considers coal a sort of submarine peat. I would bet 5 to 1 that in twenty years this will be generally admitted (An unfulfilled prophecy.); and I do not care for whatever the botanical difficulties or impossibilities may be. If I could but persuade myself that Sigillaria and Co. had a good range of depth, i.e., could live from 5 to 100 fathoms under water, all difficulties of nearly all kinds would be removed (for the simple fact of muddy ordinary shallow sea implies proximity of land). [N.B.--I am chuckling to think how you are sneering all this time.] It is not much of a difficulty, there not being sh.e.l.ls with the coal, considering how unfavourable deep mud is for most Mollusca, and that sh.e.l.ls would probably decay from the humic acid, as seems to take place in peat and in the BLACK moulds (as Lyell tells me) of the Mississippi. So coal question settled--Q.E.D. Sneer away!

Many thanks for your welcome note from Cambridge, and I am glad you like my alma mater, which I despise heartily as a place of education, but love from many most pleasant recollections...

Thanks for your offer of the 'Phytologist;' I shall be very much obliged for it, for I do not suppose I should be able to borrow it from any other quarter. I will not be set up too much by your praise, but I do not believe I ever lost a book or forgot to return it during a long lapse of time. Your 'Webb' is well wrapped up, and with your name in large letters OUTSIDE.

My new microscope is come home (a "splendid plaything," as old R.

Brown called it), and I am delighted with it; it really is a splendid plaything. I have been in London for three days, and saw many of our friends. I was extremely sorry to hear a not very good account of Sir William. Farewell, my dear Hooker, and be a good boy, and make Sigillaria a submarine sea-weed.

Ever yours, C. DARWIN.

CHARLES DARWIN TO J.D. HOOKER. Down [May 6th, 1847].

My dear Hooker,

You have made a savage onslaught, and I must try to defend myself.