Summary

Thanks CD for information on inclined terraces in S. America, which DM thinks applies to the chalk downs of S. England. CD’s definition that the sea widens and fresh water deepens is key to the subject.

Summary

Some corrections and queries about Variation text. Is pushing hard to finish, but CD is right that the names in the notes make the work interminable. Fears he is causing delay in publication. Is astonished at "the wonderful array of facts brought together and at the manner in which you bring them to bear".

Summary

Introduction of humble-bees into Australia.

Summary

The horns and spines of homopterous insects do not vary between sexes. Sexual differences in Blattidae.

Summary

On the summer, or breeding, plumage of birds.

Summary

On expression among Kaffirs.

Summary

WSD is pushing forward as fast as he can with [index to] second volume [of Variation]. The work is fearfully heavy.

Summary

Regrets that the remarks in his letter [5712] seemed to CD to be criticisms. Nothing was further from his intention. He is working hard. "The subjects often seem to elude the Index-maker."

Summary

Will return Federico Delpino’s two pamphlets soon.

Summary

CK is drawn into discussions of Darwinism everywhere in Cambridge. The climate has changed in the past three years: the younger M.A.s are greedy to know more and the criticism of the older Fellows has a new tone.

Summary

Hopes to get afternoon train from Victoria.

Woolner comes on Sunday morning.

Summary

A sermon.

Summary

Sexual differences in reptiles, especially Indian [see A. Günther, The reptiles of British India (1864)].

Summary

The Cyprinodontidae family of fishes exhibits sexual differences as remarkable as any in reptiles or birds [Descent 2: 7, 9–10].

Summary

Has received a copy of an attack on CD ["Darwinian theory examined"] from the author, but does not know who it is.

Summary

Sends a copy of his paper in Ibis [2d ser. 2 (1866): 88–109] on the birds of the Azores,

and one by G. R. Crotch on the Coleoptera [Proc. Zool. Soc. Lond. (1867): 359–91].

Summary

Left his box of plants in dog-cart [on his visit to Down].

Summary

He is vexed that CD has had to write again about the index. He has no excuse except "the nature of the work itself".

Summary

Asks CD to write a letter on his behalf to John Murray. CJG plans to translate Eduard Maetzner’s Englische Grammatik [1860–5] if publication can be arranged.

Summary

On ocelli.

Sexual differences and proportion of sexes in butterflies.

Coleoptera.

[See Descent 1: 310; 2: 132.]