"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 book is a fool." Publication of the second edition of "Variation in Animals and Plants". Publication of "The Movements and Habits of Climbing Plants" as a separate book. 1876: Wrote Autobiographical Sketch ("Life and Letters", Vol. I., Chap II.). Publication of "The Effects of Cross and Self fertilisation". "I now (1881) believe, however,...that I ought to have insisted more strongly than I did on the many adaptations for self-fertilisation." Publication of the second edition of "Observations on Volcanic Islands". 1877: Publication of "The Different Forms of Flowers on Plants of the same species". "I do not suppose that I shall publish any more books... I cannot endure being idle, but heaven knows whether I am capable of any more good work." Publication of the second edition of the Orchid book. 1878: Publication of the second edition of "The Effects of Cross and Self fertilisation". 1879: Publication of an English translation of Ernst Krause's "Erasmus Darwin", with a notice by Charles Darwin. "I am EXTREMELY glad that you approve of the little 'Life' of our Grandfather, for I have been repenting that I ever undertook it, as the work was quite beyond my tether." (To Mr Francis Galton, Nov. 14, 1879.) 1880: Publication of "The Power of Movement in Plants". "It has always pleased me to exalt plants in the scale of organised beings."