Is attempting to sum up the two theories impartially and must raise all the difficulties with each. More on his differences with CD.

No summary available.

Admits that occasional transport is not a well-established hypothesis but believes it more probable than continental extension as an explanation for the stocking of islands.

More on continental extension vs transport [or migration] hypothesis. New questions raised. On Madeira, why were insects and plants changed so much, birds hardly at all?

Erratic boulders of the Azores.

Will be glad to see JDH at Down.

Hopes to arrive with MS of "Insular floras" on Saturday.

Returns two volumes of Felix Holt [George Eliot (1866)]

and the Coddington [lens].

John Smith will send Drosera.

Nation reports that Louis Agassiz holds that the Amazon Valley was formed since the glacial epoch.

No summary available.

This is a second letter sent on the same day by Joseph Hooker to Sir Henry Barkly.

BAAS lecture on "Insular floras" [see 5135] went well.

Pleased by JDH’s success. JDH gives argument for occasional transport with perfect fairness.

W. R. Grove’s address [see 5201] good, but is disappointed that species part was so general.

On his "Insular floras" lecture.

Huxley’s success as President of Section.

D. W. R. Grove’s address. Grove left Darwinism to JDH after "sounding the charge".

[N. C.?] Seringe’s article [unspecified] has come safely.

Feels deeply at CD’s distress [Susan Darwin is dying].

Drosera will go in a day or two.

No summary available.

Darwin states he hopes ARW's paper on sexual modifications and adaptive mimicry in butterflies will be published.

Susan Darwin still lives, but is dying.

Requests an Erica massoni to compare with Drosera.

On L. Agassiz’s "astonishing" view that Amazon Valley was filled with gigantic glacier. Asa Gray says LA is determined to cover the globe with glaciers in order to destroy "Darwinian views".

Excellent review of A. Murray [The geographical distribution of mammals] in Gardeners’ Chronicle [(1866): 902].

Frankland’s Royal Institution lecture ["On the source of muscular power" Not. Proc. R. Inst. G. B. 4 (1862–6): 661–85].

Wallace’s paper.

Drosera and Erica massoni have been sent.

Had heard of Agassiz’s theory but not that CD’s theory had raised it.

JDH wrote the article on A. Murray.

Frankland’s lecture too much for him.

Did not think JDH had written Murray review [see 5217].

Does not think Gardeners’ Chronicle best for publication of "Insular floras" [Gard. Chron. (1867): 6–7, 27, 50–1, 75–6].

T. Laxton’s article, on direct action of pollen of peas on seed and pod, a grand physiological fact and "delightful" for Pangenesis.

Interview with Herbert Spencer.

Susan Darwin is dead.

Lyell has sent chapters [of 10th ed. of Principles] to JDH, who objects to CL’s ignoring the part vapour plays in affecting temperature of the globe.

Parliament will be asked to buy W. J. Hooker’s collection.