Summary

THH’s term "Pithecoid Man" is a theory in itself.

CD is convinced that his doctrine of a mundane period of glaciation is correct.

Henrietta’s serious illness.

Summary

Sends a draft of memorial to Admiralty [to be signed by geologists and palaeontologists] requesting that an expedition to survey Strait of Magellan collect fossils discovered by Admiral B. J. Sulivan [see 5142].

Summary

Has asked Hooker to sign the Wallace memorial and send it on to THH.

Read splendid lecture by THH on evolution in the Times ["On the application of the laws of evolution to the arrangement of the Vertebrata and more particularly of the Mammalia", Proc. Zool. Soc. Lond. (1880): 649–62].

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

Congratulates THH on first number of Natural History Review.

THH’s article on brain ["On the zoological relations of man with the lower animals", Nat. Hist. Rev. (1861): 67–84] completely smashes Owen.

Owen’s Leeds address [Rep. BAAS (1858): xlix–cx].

In his historical sketch of opinion on species CD has picked out some sentences [by Owen] with which he will take some revenge. CD is not bold enough to come to an open quarrel.

Summary

Extended discussion of their respective difficulties with the definition and status of species and with the extent to which the theory of transmutation may be applied.

Has rediscovered S. S. Haldeman’s 1844 paper defending the transmutation theory with great skill.

Asks for reference to Geoffroy Saint-Hilaire’s first enunciation of the progressive development and transmutation theory.

Summary

On THH’s paper on cephalous Mollusca [Philos. Trans. R. Soc. Lond. 143 (1853) pt 1: 29–66]. Discovery of the type or "idea" (in THH’s sense, not Owen’s or Agassiz’s) is one of the highest ends of natural history.

Discusses anamorphism;

position of heart in Cleodora.

Variability within species;

cementing process in cirripedes.

Summary

On the Fraser’s Magazine review by Hopkins [see 2860] and the Quarterly Review article by Wilberforce ["Darwin’s Origin of species", 108 (1860): 225–64]. The course of opinion since Oxford BAAS meeting. Asa Gray.

Need for Natural History Review, but fears it will be a burden for THH and lessen his original work. His own problem with work: if he had other duties he would be able to do absolutely nothing in science.