Permit me to thank you cordially for your most kind letter. For years I have read with interest every scrap which you have written in periodicals, and abstracted in MS. your book on Roses, and several times I thought I would write to you, but did not know whether you would think me too intrusive. I shall, indeed, be truly obliged for any information you can supply me on bud-variation or sports. When any extra difficult points occur to me in my present subject (which is a mass of difficulties), I will apply to you, but I will not be unreasonable. It is most true what you say that any one to study well the physiology of the life of plants, ought to have under his eye a multitude of plants. I have endeavoured to do what I can by comparing statements by many writers and observing what I could myself. Unfortunately few have observed like you have done. As you are so kind, I will mention one other point on which I am collecting facts; namely, the effect produced on the stock by the graft; thus, it is SAID, that the purple-leaved filbert affects the leaves of the common hazel on which it is grafted (I have just procured a plant to try), so variegated jessamine is SAID to affect its stock. I want these facts partly to throw light on the marvellous laburnum Adami, trifacial oranges, etc. That laburnum case seems one of the strangest in physiology. I have now growing splendid, FERTILE, yellow laburnums (with a long raceme like the so-called Waterer's laburnum) from seed of yellow flowers on the C. Adami. To a man like myself, who is compelled to live a solitary life, and sees few persons, it is no slight satisfaction to hear that I have been able at all [to] interest by my books observers like yourself. As I shall publish on my present subject, I presume, within a year, it will be of no use your sending me the shoots of peaches and nectarines which you so kindly offer; I have recorded your facts. Permit me again to thank you cordially; I have not often in my life received a kinder letter. My dear Sir, yours sincerely, CH. DARWIN. CHAPTER 2.V. -- THE PUBLICATION OF THE 'VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION.' JANUARY 1867, TO JUNE 1868. [At the beginning of the year 1867 he was at work on the final chapter--"Concluding Remarks" of the 'Variation of Animals and Plants under Domestication,' which was begun after the rest of the MS. had been sent to the printers in the preceding December. With regard to the publication of the book he wrote to Mr. Murray, on January 3:--