Thanks CD for his paper on Lythrum [Collected papers 2: 106–31].

Astonished by CD’s powers of observation and perseverance.

His elms raised from three varieties of weeping elms are doing well.

Sends photograph.

THH wishes he could write the popular zoology but writing is a boring and slow process when he is not interested, and he is overburdened with lectures.

Forwards H. T. Stainton letter for reply.

Finds many Cucurbita have tendrils with sticking ends.

The "potentiality of so many organs in plants to play so many parts is one of the most wonderful of your discoveries . . . one day it will itself play a prodigious part in the interpretation of both morphological and physiological facts".

Is disgusted with Sabine’s address [see 4708] because of its mutilation of what JDH wrote.

THH’s slashing leader in Reader ["Science and ""Church policy"" ", 4 (1864): 821] – as usual he destroys all in his path.

Encloses letter from G. H. K. Thwaites with a message for CD [see encl].

Thanks for Lythrum paper [Collected papers 2: 106–31].

T. S. Cobbold’s book on the Entozoa [1864].

Remarks on development of the tapeworm.

Ludwig Rütimeyer thanks CAB for the skull of a Chillingham cow, and thinks it may belong to the Primigenius race.

Regrets he has not yet finished his monograph on Bos. Has examined and discusses the Bos skull from Lord Tankerville.

Would like CD’s opinion on the conclusions in LR’s paper on fossil horses.

Thanks for photograph, charmed by Mrs Huxley’s letter.

Regrets THH cannot do the popular work on zoology.

Has heard THH wrote leading article in last Reader ["Science and ""church policy"" ", 4 (1864): 821].

"I return your letter to [William] Sharpey." Grandest eulogium CD has received.

Thanks CD for his Lythrum paper [Collected papers 2: 106–31].

Tells of the birth of his 16th child. Has five grandchildren.

Has finished long paper on "Climbing plants". Prefers sending it to Linnean Society if Bentham does not think it too long.

For New Zealand flora [1864–7] CD suggests JDH count plants with irregular corollas and compare with England.

Does not quite agree about Reader.

Is Tyndall author of piece on spiritualism?

CD’s illness diagnosed as "suppressed gout".

Bentham wants "Climbing plants" for Journal of the Linnean Society, however long [J. Linn. Soc. Lond. (Bot.) 9 (1865): 1–118]. Publication in Proceedings of the Royal Society restricts correspondence.

Reader much improved.

Tyndall did write piece on spiritualism ["Science and the spirits", Reader 4 (1864): 725–6].

"Suppressed gout" annoys him as a term cloaking ignorance.

Thanks TCE for information about breeding

and for his promise to measure feet of otter-hounds [see Variation 1: 39–40].

Concerning the proposed translation of K. F. von Gärtner’s Bastarderzeugung (1849).

Thanks for [E. Eudes?] Deslongchamps’ paper.

Henry Huxley born.

Leader in Reader [4 (1864): 821] is by THH. It has got him into trouble with some of his friends.

His view of Origin.

Belief of Duke of Argyll that substituting "variation" and "selection" for creation deifies them.

Thinks Argyll would accept evolution except for man.

A’s view of humming-birds.

Describes discussion with [Victoria,] Princess Royal of Prussia, about evolution.

New edition of Elements consistent with Origin.

New herbarium is finished.

Congratulations on Copley Medal.

Asks that the long paper that he is sending for the Society be acknowledged when received.

Pleased to learn that HD has resumed research on Anoplura.

Are Chiloe pediculi a distinct species?

Do lice differ on different races of humans?

Is there evidence supporting Mr Marshall’s statement about Polynesian lice?

"Climbing plants" sent off.

Encourages JDH to include notes on gradation of important characters in Genera plantarum or to write a paper on the subject. Has given prominence to gradation of unimportant characters in climbing plants. Believes that it is common for the same part in an individual plant to be in different states. Same may be true of important parts – for example position of ovule may differ.

Two articles in last Natural History Review interested him; "Colonial floras" [n.s. 5 (1865): 46–63]

and "Sexuality of cryptogams" [n.s. 5 (1865): 64–79].

Fact of similarity of orders in tropics is extremely curious. Thinks it may be connected with glacial destruction.

Leo Lesquereux says he is a convert for the curious reason that CD’s books make birth of Christ and redemption by grace so clear to him!

"Not one question [for JDH] in this letter!"

Cannot come until week from Saturday.

Worked to death by Genera plantarum.