Thanks for Variation.
Reports work on his travel book [The Malay Archipelago (1869)].
Thanks for Variation.
Reports work on his travel book [The Malay Archipelago (1869)].
Reports work on sexual selection. Problems with the relative numbers of the two sexes and polygamy. Asks ARW’s help with several questions on polygamous birds.
Responds to CD’s queries on polygamy in birds and orang.
Discusses sexual selection and secondary characters; colours and sexual preference.
Expresses his admiration for Pangenesis; it is superior to Herbert Spencer’s theory.
ARW differs somewhat with CD’s chapter on causes of variability [ch. 22 in Variation]. Thinks several of CD’s arguments are unsound.
Briefly discusses how natural selection might aid in producing sterility between allied species.
Pleased by ARW’s response to Pangenesis.
On negative reception by his friends.
Further argument concerning sterility and natural selection.
Polygamy and sexual selection.
Protection.