Support CD’s views on variability of species, but believes they must be interpreted "spiritualisticamente".

Cross-fertilisation in the Asclepiadaceae.

Declares himself CD’s defender; but he is a "teleologist".

Sends CD three more papers.

His research confirms his faith and belief in variability of species.

Thanks FD for his three publications.

CD is pleased that FD has discussed Pangenesis, although he does not favour the hypothesis. Will seek English publisher.

Acknowledges receipt of CD’s Primula paper [J. Linn. Soc. Lond. (Bot.) 10 (1869): 437–54].

Nectar-sucking birds fertilise tropical flowers.

Writing a "Dualistic apologia for Pangenesis" [see translation in Sci. Opin. 2 (1869): 365–7, 391–3, 407–8].

Homology of the orchid rostellum.

Cautions FD about fluid in labellum of Coryanthes.

T. H. Farrer is enthusiastic about FD’s papers.

Believes humming-birds fertilise many American flowers.

Mentions his reply to FD’s criticisms ["Pangenesis: Mr Darwin’s reply to Professor Delpino", Sci. Opin. 2 (1869): 426; Collected papers 2: 158–60].

Suggests that FD study fertilisation of Gramineae.

Comments on Hermann Crüger’s paper, sent by CD, on fertilisation of orchids [J. Linn. Soc. Lond. (Bot.) 8 (1865): 127–35].

Observations on dichogamy in grasses (wheat, rye, barley).

Has not yet read CD’s reply to his article on Pangenesis [Collected papers 2: 158–60].