Regrets he did not make the statement [unspecified] referred to by CD.

Believes the Origin has been very valuable, even among those not disposed to agree with transmutation, in giving a great check to "species manufacture".

Will come to dine on Monday unless he hears to the contrary.

John Lubbock’s lecture on man a success [Not. Proc. R. Inst. G. B. 4 (1863): 29–40].

JDH on the effect of the Civil War on Asa Gray.

JDH’s opinion of Lyell on glaciers is improving.

JS criticises natural selection as based on an innate "continuously watchful selective principle".

Seeks seed of wild Rocky Mountain maize.

What is CD’s view on origin of maize?

Seeks information on self-sterility of Passiflora and Lobelia.

Weeping habit of trees.

Intended to say bisexual plants presented more established varieties than unisexual, not that they are more variable.

Explains his opinion that homomorphically fertilised Primula will produce only their own form. Is trying homomorphic crosses with different coloured Primula varieties.

Asks to read Asa Gray’s 2d review of Orchids.

Has finally successfully fertilised Gongora, but it was done by unnatural means.

Ill health.

At work on Variation.

Reading JDH on Welwitschia.

Letter from Lyell defends his position on species.

Anger at Owen.

John Lubbock’s lectures.

Sends copy of his December letter [see 3851], which he fears is lost.

Has been in the Southern Alps and has discovered a wonderful pass.

At CD’s request HBD has traced the quotation; it is on regeneration from Charles White in W. B. Carpenter’s Comparative physiology (1854), p. 480.

Is gratified that CD thinks some of the arguments in his book [Lectures on the germs of disease (1861)] are satisfactory.

Thanks CD for his review [of H. W. Bates’s paper on mimetic butterflies, Collected papers 2: 87–92].

Is glad Hooker approved of his [JL’s] lecture.

Thanks for information [on regeneration quotation].

Answers JS’s criticism of natural selection, which he doubts JS understands. CD does not believe in an "innate selective principle".

To understand "utility" JS should read CD on correlation.

Origin of maize: no longer thinks husked form was wild because of Asa Gray’s evidence on its variability.

Has information from Thomas Rivers on weeping habit in trees.

JS’s experiments on coloured primroses.

Encloses bibliographical note on Passiflora.

Discusses partnership in bank and whether Atherley would like to retire.

Lyell’s position on mutability.

Directions for care of hothouse plants.

Falconer hostile to Lyell’s book.

JDH’s Wedgwood ware collection.

Discusses crossed varieties of sheep and ducks.

Lyell’s position on mutability.

Fertilisation of trees by bees.

JDH battling with Lyell over treatment of species question in Antiquity of man. Distressed by Lyell’s raising false priority issue between JDH and CD. Falconer involved in a priority squabble.

Sends two [unidentified] papers on inheritance of medical malformations. Suggests that besides the inheritance of specific variations, the tendency to show variations in the same organ system (stomach, nervous, etc.) may also be inherited.

RT has sent his observations on orchids to CD. Has found only one case of an insect with a pollinium adhering to it.

Lyell’s Antiquity of man lacks originality.

Statements in Lyell provoke CD to determine exact publication date of Origin and JDH’s introductory essay [to Flora Tasmaniae].

CD now believes in repeated periods of global cooling and migration.

Bee species of different sizes build cells the same size.

Having trouble understanding laws of phyllotaxy in order to grasp Hugh Falconer’s objections.

L. C. Treviranus on Primula [see 3980] misses the "prettiness" of the adaptations.

John Scott says P. scotica is never dimorphic.