No summary available.

Thanks for information [about sex ratios] received from bird-catchers.

"Can you form any theory about all the many cases which you have given me and others which have been published, of when one pair is killed, another soon appearing?"

Facts about gay-coloured caterpillars very satisfactory.

Comments on Pangenesis.

Returns volumes of the Ibis.

Requests T. C. Jerdon’s Birds of India

and Thomas Bell’s British reptiles

as well as vols. 5 & 6 of Ibis.

Thanks THF for correcting the error in Orchids.

Asks him to find out what insects visit the fly orchid and for what purpose.

Requests 50 copies of his paper ["Offspring of illegitimate unions of di- and trimorphic plants", J. Linn. Soc. Lond. (Bot.) 10 (1869): 393–437].

"I have seen the action on Ophrys exactly as you describe and am thoroughly ashamed of my inaccuracy."

Comments on THF’s MS [on fertilisation of scarlet runners]. Suggests publication, though CD anticipated main features ten years before. Is amused at the caution with which THF put his case that the final end [of the contrivances] was crossing distinct individuals.

Will send THF’s paper [on scarlet runners] to Annals and Magazine of Natural History with a note recommending publication [see 6384].

Suggests books on Lobelia.

Informs THF that Annals and Magazine of Natural History will publish his paper [see 6384].

Suggests THF write a paper on violets. Asa Gray, once a sceptic, now declares he is convinced whole structure of a flower is adapted for a cross with another individual.

Urges THF not to give up Pangenesis lightly. "It has thrown light on my mind in regard [to] a great series of complex phenomena."

Advises THF that best plan is to investigate the part certain structures play with all plants or orders, instead of describing means of fertilisation in particular plants. Naturalists value observations far more than reasoning.