RS’s facts are remarkable. A year or two ago CD would not have believed ants could produce an inherited effect, but he has "lately come to believe rather more in inherited mutilations". However, CD is not satisfied that the sacs are inherited and urges RS to produce any other evidence he might have.

Glad BDW has proved his case on dimorphism of Cynips.

Interested in galls

and BDW’s Cicada articles [Proc. Entomol. Soc. Philadelphia (1864)].

"My experiment was intended solely to show that colour reappeared, and I choose kinds which breed [true] to colour, as is certainly the case with [sports] and those which I tried . . .

I have recorded an undoubted case of wild rock Pigeons caught in Scotland having bred in confinement …"

Drosophyllum plants recovering [from trip]. Describes experiments on them.

No summary available.

ARW’s review of 10th ed. of Lyell’s Principles [see 6684] is admirable.

But he differs "grievously" with ARW on man. CD sees no necessity for an additional and proximate cause.

Wants information on plumage of chickens

and table of sex ratios in greyhounds.

Not well owing to fall from horse.

[Drosophyllum] plants going on very well.

Thanks for greyhound table; interested in transmission of colour in greyhounds and relationship to sex.

Regrets he cannot come to London to be photographed [for GCW’s Eminent men of the day (1870)]. Invites GCW to Down.

Enquires about spurs in the last year’s birds of Pavo Spicifer and cristatus.

Enquires about sexual differences in mandrills.

Asks the correct spelling of JNH’s surname and offers to send a copy of Journal of Researches.

Thanks PGK for his aid in reporting the curious case of the parrot.

Will consult John Gould about rosella [Australian parakeet].

Recalls with pleasure their friendship on board the Beagle.

Arranges to send a copy of Journal of researches.

Thanks GM for specimens of Drosophyllum; by a strange coincidence CD has also received plants from a correspondent in Oporto [W. C. Tait].

Thanks JM for Quarterly Review. A. R. Wallace’s article inimitably good – and a triumph that it appears where it will make B[ishop] of O[xford] and Owen gnash their teeth.

Delighted at the sale of F. Müller’s book.

Thinks he has brought Origin up to "present standard of science" [5th ed. (June 1869)].

Slow progress on Descent.

His horse rolled over him, but he is recovering rapidly.

Has made a wonderful recovery [from riding accident].

Asks for information on blushing and screaming [for Expression].

Asks MS whether he will examine adult mandrills and describe the sexual differences in colouring.