Has heard from Asa Gray [see 3850] that JA is bringing live plants over for CD. Gives address for forwarding box to Down.

Thanks for Dawson’s letter. Doubts his evidence that climate of land was not glacial when upheaved after submergence.

Encloses memorandum of questions for C. V. Naudin.

Expression of the emotions.

Is building a hothouse for plant experimenting.

JDH’s ideas on America are more atrocious than his. What a new idea that struggle for existence is necessary to try to purge a government! Probably true. Slavery draws him one way one day, another the next. Yankees are "detestable toward us". Tocqueville.

CD interested in hybrid sterility and encloses his preliminary MS. Outlines experiments to test for existence of sterility in breeds of poultry and pigeons.

Experiments on dimorphism have led him to change in part his opinion as given in Origin, and he is now asking pigeon and poultry fanciers for any examples of special selective sterility [i.e., a particular pair are sterile when crossed, but each individual is fertile with others] and hopes to investigate its inheritance.

Returns Kingsley’s letter [see ML 1: 225 n.].

Lectures [to working men] would do good if widely circulated.

On sterility, they differ so much there is no use arguing. To get the degree of sterility THH expects in recently formed varieties seems to CD simply hopeless. Has suggested a test experiment to Tegetmeier [two fertile birds paired and unproductive].

Thanks for letter [missing] and help.

Asks about the effect said to be produced on the stock by a graft.

Health prevents accepting TR’s invitation.

Asks for any authentic cases of "sports", which CD calls "bud-variations". Flowers introduced from warmer temperate regions are said to be particularly apt to sport in this way.

CD now has proof that Cinchona is dimorphic and that some dimorphic plants are absolutely sterile with their own-form pollen.

Asks GHKT to examine or send pollen specimens of two Ceylon genera.

Genera plantarum reviewed in Parthenon by a man who says JDH is disgraced by being "obviously tinged with Darwinism".

CD by chance has found that Saturday Review article [14 (1862): 589] on Duke of Argyll was written by his [CD’s] nephew, Henry Parker.

Asa Gray sends American newspapers which CD never reads.

Has HF met with any cases of what gardeners call "sports" and what CD will call "bud-variations"?

Inquires whether penguin ducks can run faster than other kinds.