Summary

Asks THH question on flow of glaciers after ice has been fractured and fragmented.

CD had to leave Royal Society lecture [joint paper by THH and J. Tyndall, "On the structure and motions of glaciers", Philos. Trans. R. Soc. Lond. 147 (1857): 327–46] before the end because of headache.

Summary

Thanks THH for his response on glacial movement. Hopes Tyndall will experiment on broken ice and explain how two pieces of ice can freeze together.

Sorry to hear of THH’s row with Richard Owen.

Summary

Asks THH’s opinion on embryological views of G. A. Brullé [Ann. & Mag. Nat. Hist. 13 (1844): 484–6] and F. M. Barnéoud [Ann. des Sci. Nat. ser. 3, Bot. 6 (1846): 268–96] and on Milne-Edwards’ classification.

Has been reading John Goodsir ["On the morphological constitution of the skeleton of the vertebrate head", Edinburgh New Philos. J. 2d ser. 5 (1857): 123–78].

Has embryology of bats ever been worked out?

Summary

THH comments on G. A. Brullé’s paper ["Researches upon the transformations of the appendages of the Articulata", Ann. & Mag. Nat. Hist. 13 (1844): 484–6].

Summary

Thanks THH for his cautionary response on Brullé, but departs from THH in thinking that Barnéoud, if true, would shed light on Milne-Edwards’ proposition that the wider apart classes of animals are the earlier they depart from common embryonic plan.

Summary

Thanks for three last lectures and the account of cirripedes.

Difficulty of classifying the higher groups.

Summary

Agassiz’s superficiality and wretched reasoning powers. But he stirred up Europe on glaciers. Lyell has been working on their effects – testing work of others.

CD believes "Natural Systems" ought to be simply genealogical. "Time will come when we shall have true genealogical trees of each great kingdom of nature."

Summary

On classification and possibilities of a scientific morphology and zoology. CD’s "pedigree business" is important for physiology but has nothing to do with pure zoology any more than human pedigree has to do with the census. Zoological classification is a census of the animal world.

Summary

Thinks naturalists look for something further than Cuvier’s view of classification. Poses a theoretical problem on the classification of the races of man to prove that a genealogical system is best.

Summary

Glad THH has taken up aphid question versus Owen ["On the agamic reproduction and morphology of Aphis", Trans. Linn. Soc. Lond. 22 (1858): 193–236].

Fertilisation and inheritance discussed. Speculates that fertilisation may be a mixture rather than a fusion. Can understand in no other way why crossed forms tend to go back to ancestral forms.

Summary

THH’s catalogue [THH and R. Etheridge, A catalogue of the collection of fossils in the Museum of Practical Geology (1865), part published in 1857] best résumé he has seen of science of natural history. On classification he is not quite sure that he wholly goes along with THH. Encloses a few criticisms of THH’s preface.[enclosure survives as copy only].

Summary

Congratulations on birth of THH’s daughter [Jessie].

On aboriginal dun colour of horses.

Examples of inaccuracies and perpetuation of errors [on hybrids] by "compilers, of which I am one".

Summary

CD’s reasons for not signing the memorial requesting removal of natural history exhibits from British Museum. Less sure about moving botanical specimens to Kew. His notion of museum organisation.

Summary

Hooker has convinced him that move of British Museum by Government is anticipated. He is now willing to sign the memorial. Still fears for library needs, and objects to distant Kensington site. Lyell should be asked to sign.

Summary

Has had some misgivings about the memorial but now thinks his fears were vain and cowardly. Regrets R. I. Murchison was not told in advance. His low opinion of the Government and B. Disraeli.

Summary

K. E. von Baer’s view of the air bladder of fishes.

Summary

Sends THH questions about "serial homologies" and "vegetative repetition" in Mollusca and Radiata.

Abstract volume [Origin] nearly completed.

Summary

Serial homologies in the Mollusca. Gives instances of repetition of homological parts in Radiata.

Summary

Thanks for THH’s examples of serially modified and homologous parts in Radiata. Cannot understand how he forgot such cases.

Agassiz’s Essay on classification [1859] utterly impracticable rubbish.

Summary

THH should understand that CD’s hypothesis [natural selection] has as many flaws and holes as sound parts. The question is whether CD’s rag of a hypothesis is worth anything. A poor rag is better than nothing to carry one’s fruit to market.