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nimals and plants； it at once struck me that under these circumstances favourable variations would tend to be preserved； and unfavourable 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。〃
1839：
Married at Maer （Staffordshire） to his first cousin Emma Wedgwood； daughter of Josiah Wedgwood。
〃I marvel at my good fortune that she； so infinitely my superior in every single moral quality； consented to be my wife。 She has been my wise adviser and cheerful comforter throughout life； which without her would have been during a very long period a miserable one from ill…health。 She has earned the love of every soul near her〃 （Autobiography）。
Dec。 31。 〃Entered 12 Upper Gower street〃 （now 110 Gower street； London）。 〃There never was so good a house for me； and I devoutly trust you （his future wife） will approve of it equally。 The little garden is worth its weight in gold。〃
Published 〃Journal and Researches〃； being Vol。 III。 of the 〃Narrative of the Surveying Voyage of H。M。S。 'Adventure' and 'Beagle'〃。。。
Publication of the 〃Zoology of the Voyage of H。M。S。 'Beagle'〃； Part II。； 〃Mammalia〃； by G。R。 Waterhouse； with a 〃Notice of their habits and ranges〃； by Charles Darwin。
1840：
Contributed Geological Introduction to Part I。 （〃Fossil Mammalia〃） of the 〃Zoology of the Voyage of H。M。S。 'Beagle'〃 by Richard Owen。
1842：
〃In June 1842 I first allowed myself the satisfaction of writing a very brief abstract of my （species） theory in pencil in 35 pages； and this was enlarged during the summer of 1844 into one of 230 pages； which I had fairly copied out and still （1876） possess。〃 （The first draft of 〃The Origin of Species〃； edited by Mr Francis Darwin； will be published this year （1909） by the Syndics of the Cambridge University Press。）
Sept。 14。 Settled at the village of Down in Kent。
〃I think I was never in a more perfectly quiet country。〃
Publication of 〃The Structure and Distribution of Coral Reefs〃； being Part I。 of the 〃Geology of the Voyage of the Beagle〃。
1844：
Publication of 〃Geological Observations on the Volcanic Islands visited during the Voyage of H。M。S。 'Beagle'〃； being Part II。 of the 〃Geology of the Voyage of the 'Beagle'〃。
〃I think much more highly of my book on Volcanic Islands since Mr Judd； by far the best judge on the subject in England； has； as I hear； learnt much from it。〃 （Autobiography； 1876。）
1845：
Publication of the 〃Journal of Researches〃 as a separate book。
1846：
Publication of 〃Geological Observations on South America〃； being Part III。 of the 〃Geology of the Voyage of the 'Beagle'〃。
1851：
Publication of a 〃Monograph of the Fossil Lepadidae〃 and of a 〃Monograph of the sub…class Cirripedia〃。
〃I fear the study of the Cirripedia will ever remain 'wholly unapplied；' and yet I feel that such study is better than castle…building。〃
1854：
Publication of Monographs of the Balanidae and Verrucidae。
〃I worked steadily on this subject for。。。eight years； and ultimately published two thick volumes； describing all the known living species； and two thin quartos on the extinct species。。。My work was of considerable use to me； when I had to discuss in the 〃Origin of Species〃 the principles of a natural classification。 Nevertheless； I doubt whether the work was worth the consumption of so much time。〃
〃From September 1854 I devoted my whole time to arranging my huge pile of notes； to observing； and to experimenting in relation to the transmutation of species。〃
1856：
〃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'。〃
1858：
Joint paper by Charles Darwin and Alfred Russel Wallace 〃On the Tendency of Species to form Varieties； and on the perpetuation of Varieties and Species by Natural Means of Selection；〃 communicated to the Linnean Society by Sir Charles Lyell and Sir Joseph Hooker。
〃I was at first very unwilling to consent （to the communication of his MS。 to the Society） as I thought Mr Wallace might consider my doing so unjustifiable； for I did not then know how generous and noble was his disposition。〃
〃July 20 to Aug。 12 at Sandown （Isle of Wight） began abstract of Species book。〃
1859：
Nov。 24。 Publication of 〃The Origin of Species〃 （1250 copies）。
〃Oh； good heavens； the relief to my head and body to banish the whole subject from my mind！。。。But； alas； how frequent； how almost universal it is in an author to persuade himself of the truth of his own dogmas。 My only hope is that I certainly see many difficulties of gigantic stature。〃
1860：
Publication of the second edition of the 〃Origin〃 （3000 copies）。
Publication of a 〃Naturalist's Voyage〃。
1861：
Publication of the third edition of the 〃Origin〃 （2000 copies）。
〃I am going to write a little book。。。on Orchids； and to…day I hate them worse than everything。〃
1862：
Publication of the book 〃On the various contrivances by which Orchids are fertilised by Insects〃。
1865：
Read paper before the Linnean Society 〃On the Movements and Habits of Climbing plants〃。 （Published as a book in 1875。）
1866：
Publication of the fourth edition of the 〃Origin〃 （1250 copies）。
1868：
〃I have sent the MS。 of my big book； and horridly； disgustingly big it will be； to the printers。〃
Publication of the 〃Variation of Animals and Plants under Domestication〃。
〃About my book； I will give you （Sir Joseph Hooker） a bit of advice。 Skip the whole of Vol。 I； except the last chapter； （and that need only be skimmed）； and skip largely in the 2nd volume； and then you will say it is a very good book。〃
〃Towards the end of the work I give my well…abused hypothesis of Pangenesis。 An unverified hypothesis is of little or no value； but if anyone should hereafter be led to make observations by which some such hypothesis could be established； I shall have done good service； as an astonishing number of isolated facts can be thus connected together and rendered intelligible。〃
1869：
Publication of the fifth edition of the 〃Origin〃。
1871：
Publication of 〃The Descent of Man〃。
〃Although in the 'Origin of Species' the derivation of any particular species is never discussed； yet I thought it best； in order that no honourable man should accuse me of concealing my views； to add that by the work 'light would be thrown on the origin of man and his history'。〃
1872：
Publication of the sixth edition of the 〃Origin〃。
Publication of 〃The Expression of the Emotions in Man and Animals〃。
1874：
Publication of the second edition of 〃The Descent of Man〃。
〃The new edition of the 〃Descent〃 has turned out an awful job。 It took me ten days merely to glance over letters and reviews with criticisms and new facts。 It is a devil of a job。〃
Publication of the second edition of 〃The Structure and Distribution of Coral Reefs〃。
1875：
Publication of 〃Insectivorous Plants〃。
〃I begin to think that every one who publishes a