I then saw Chatsworth, and was in transport with the great hothouse; it is a perfect fragment of a tropical forest, and the sight made me think with delight of old recollections. My little ten-day tour made me feel wonderfully strong at the time, but the good effects did not last. My wife, I am sorry to say, does not get very strong, and the children are the hope of the family, for they are all happy, life, and spirits. I have been much interested with Sedgwick's review (Sedgwick's review of the 'Vestiges of Creation' in the 'Edinburgh Review,' July, 1845.) though I find it far from popular with our scientific readers. I think some few passages savour of the dogmatism of the pulpit, rather than of the philosophy of the Professor's Chair; and some of the wit strikes me as only worthy of -- in the 'Quarterly.' Nevertheless, it is a grand piece of argument against mutability of species, and I read it with fear and trembling, but was well pleased to find that I had not overlooked any of the arguments, though I had put them to myself as feebly as milk and water. Have you read 'Cosmos' yet? The English translation is wretched, and the semi-metaphysico-politico descriptions in the first part are barely intelligible; but I think the volcanic discussion well worth your attention, it has astonished me by its vigour and information. I grieve to find Humboldt an adorer of Von Buch, with his classification of volcanos, craters of elevation, etc., etc., and carbonic acid gas atmosphere. He is indeed a wonderful man. I hope to get home in a fortnight and stick to my wearyful South America till I finish it. I shall be very anxious to hear how you get on from the Horners, but you must not think of wasting your time by writing to me. We shall miss, indeed, your visits to Down, and I shall feel a lost man in London without my morning "house of call" at Hart Street... Believe me, my dear Lyell, ever yours, C. DARWIN. CHARLES DARWIN TO J.D. HOOKER. Down, Farnborough, Kent. Thursday, September, 1846. My dear Hooker, I hope this letter will catch you at Clifton, but I have been prevented writing by being unwell, and having had the Horners here as visitors, which, with my abominable press-work, has fully occupied my time. It is, indeed, a long time since we wrote to each other; though, I beg to tell you, that I wrote last, but what about I cannot remember, except, I know, it was after reading your last numbers (Sir J.D. Hooker's Antarctic Botany.), and I send you a uniquely laudatory epistle, considering it was from a man who hardly knows a Daisy from a Dandelion to a professed Botanist...