A quarter of a century ago, you and I must have been in something like the same state of mind on the main question, but you were able to see and work out the quo modo of the succession, the all-important thing, while I failed to grasp it. I send by this post a little controversial pamphlet of old date--Combe and Scott. If you will take the trouble to glance at the passages scored on the margin, you will see that, a quarter of a century ago, I was also one of the few who then doubted the absolute distinctness of species, and special creations of them. Yet I, like the rest, failed to detect the quo modo which was reserved for your penetration to DISCOVER, and your discernment to APPLY. You answered my query about the hiatus between Satyrus and Homo as was expected. The obvious explanation really never occurred to me till some months after I had read the papers in the 'Linnean Proceedings.' The first species of Fere-homo ("Almost-man.") would soon make direct and exterminating war upon his Infra-homo cousins. The gap would thus be made, and then go on increasing, into the present enormous and still widening hiatus. But how greatly this, with your chronology of animal life, will shock the ideas of many men! Very sincerely, HEWETT C. WATSON. J.D. HOOKER TO CHARLES DARWIN. Athenaeum, Monday [November 21st, 1859]. My dear Darwin, I am a sinner not to have written you ere this, if only to thank you for your glorious book--what a mass of close reasoning on curious facts and fresh phenomena--it is capitally written, and will be very successful. I say this on the strength of two or three plunges into as many chapters, for I have not yet attempted to read it. Lyell, with whom we are staying, is perfectly enchanted, and is absolutely gloating over it. I must accept your compliment to me, and acknowledgment of supposed assistance from me, as the warm tribute of affection from an honest (though deluded) man, and furthermore accept it as very pleasing to my vanity; but, my dear fellow, neither my name nor my judgment nor my assistance deserved any such compliments, and if I am dishonest enough to be pleased with what I don't deserve, it must just pass. How different the BOOK reads from the MS. I see I shall have much to talk over with you. Those lazy printers have not finished my luckless Essay; which, beside your book, will look like a ragged handkerchief beside a Royal Standard... All well, ever yours affectionately, JOS. D. HOOKER. CHARLES DARWIN TO J.D. HOOKER. Ilkley, Yorkshire [November 1859]. My dear Hooker,