Response to ARW’s MS on geological time ["The measurement of geological time", Nature 1 (1870): 399–401, 452–5].

Groans over [what is said about] man.

Thanks for a woodcut sent by ARW for Descent.

Congratulations on his removal from London,

and praise of his review of Francis Galton ["Hereditary genius", Nature 1 (1870): 501–3]. CD agrees with every word of it.

Appreciation of eulogy in preface of ARW’s book [Theory of natural selection].

CD sends a "curious drawing" [missing] relating to imitation and protection.

Praise for ARW’s reply [Nature 3 (1870): 49–50] to a paper by A. W. Bennett ["Natural selection from a mathematical point of view", Nature 3 (1870): 30–3] holding that mind is a leading cause of variation.

Is reading proof of his "confounded book" [Descent].

Responds to ARW’s comments on CD’s argument about protection in Descent.

Comments on St G. Mivart’s criticism [Genesis of species (1871)]. "The pendulum will now swing against us."

Appreciative response to ARW’s "grand review" of Descent in the Academy [2 (1871–2): 177–82]. Comments in detail on ARW’s criticisms.

On the flourishing sales of their respective books. Mentions reviews of Descent in Pall Mall Gazette [21 Mar 1871] and in the Spectator [11 Mar 1871, pp. 288–9; 18 Mar 1871, pp. 319–20].

Requests advice about Chauncey Wright’s article on Mivart’s Genesis of species [North Am. Rev. 113 (1871): 64–103]. CD thinks of publishing it as a pamphlet to counter impact of Mivart’s criticism of natural selection.

CD is allowing his family to decide whether Chauncey Wright’s paper on Mivart is dull.

Health and despondency.

Doubts his ability to answer Mivart successfully [in 6th ed. of Origin].

On a "remarkable" letter from Fritz Müller [see 7820] about mimicry, protection, and sexual selection.

On ARW’s "crushing" review [Nature 6 (1872): 237–9] of C. R. Bree’s An exposition of fallacies in the hypothesis of Mr Darwin.

Comments on other reviews and exchanges.

Detailed response to reading of Bastian’s Beginnings of life [1872]. On the whole, it seems probable to CD that spontaneous generation is true.

Huxley’s report of Bastian’s having watched the development of the scale of Sphagnum. The importance of studies of possible causes of heterogenesis.

Remarks about an enclosed specimen,

and extract of letter from W. A. L. Marshall [8560].

ARW’s good review of J. C. Houzeau de Lehaie [Études sur les facultés mentales des animaux, in Nature 6 (1872): 469–71].

Requests the address of F. F. Geach so that he may send him his book [Expression].

Response to ARW’s criticisms in his review [of Expression, Q. J. Sci. n.s. 3 (1873): 113–18].

Further discussion of ARW’s help on new [2d] edition of Descent.

Response to ARW’s "grand and memorable work" [Geographical distribution (1876)]. Most interesting part to CD is ARW’s "protest against sinking imaginary continents".

Further detailed comments on Geographical distribution.

Base treatment [of George Darwin] by Mivart in Quarterly Review [137 (1874): 40–77].