Requests information on the standard of beauty of savages and on whether the female has any influence in selecting a male.

CD has questions related to colour differences in the sexes of butterflies, especially in relation to HWB’s paper ["On variation in sexes of Argynnis diana", Proc. Entomol. Soc. Philadelphia 4 (1865): 204–7].

Mentions that his MS on Lepidoptera [for Descent] is longer than he intended and the information is four-fifths owed to HWB.

Thanks HWB for answering questions.

The MS on Lepidoptera is almost finished and he is glad HWB will read it; he is fearful of mistakes, not being familiar with the subject.

Lists specimens he wants from Mr Janson, emphasising that he always wants male and female.

He extends an invitation for a Sunday in early June.

Explains why he has declined writing a review for Messrs Appleton.

Thanks for assistance. He will write fully to Wallace tomorrow.

Orders five works on the Sandwich Islands from the Royal Geographical Society Library for his investigation of infanticide and population trends there.