CL’s research on flint tools.

Promises to send proof-sheets of Origin. Discusses his view of species.

Ill health of himself and his family.

Thanks CL for his favourable remarks to the Geological Section of the BAAS concerning the forthcoming publication of the Origin. Hopes CL will accept his view of species.

Comments on CL’s paper ["On the occurrence of works of human art in post-Pliocene deposits", Rep. BAAS 29 (1859): 93–5].

Discusses text of Origin.

Compares Eocene and modern climates.

Mentions Hooker’s view of his geographical [distribution] chapters.

Asks CL’s opinion of his statements on distribution during "glacial and preceding warmer periods".

Mentions chapters on geological record and embryology.

Is sending off last proof-sheets of Origin.

Asks CL’s opinion of final chapter. Mentions difficulties of his argument.

Is too unwell to start for Ilkley.

Murray’s printing of 1250 copies seems too large to CD.