A Tasmanian Cyttaria is same species as CD’s Fuegian fungus. Did the species originate on the beeches of Fuegia or of Tasmania?

JDH gives interpretation of Vestiges.

John McCulloch, J. F. Schouw, and Lamarck on the species question.

First part of "Galapagos flora" ["Plants of the Galapagos Archipelago", Trans. Linn. Soc. Lond. 20 (1851): 163–233] finished but not printed.

Details of distribution of Galapagos flora. Peculiarity of island floras.

Leaves for Edinburgh on Wednesday.

Discusses the microscopic structure of rock samples from Chile and the Pampas. Describes organic remains found in the samples.

Has marked probable depths of the specimens on CD’s list of S. American shells. Asks for details which would provide more precise conclusions. [See South America, p. 226.]

Is about to send his paper on Galapagos beetles to press. Has written some introductory material on which he invites CD’s comments.

Discusses his paper on CD’s Galapagos beetles ["Coleopterous insects … in the Galapagos Islands", Ann. & Mag. Nat. Hist. 16 (1845): 19–41] which he will forward when printed. Has drawn up descriptions of several other insects from CD’s collections.

Answers CD’s questions relating to the flora of the Galapagos. [See 889.]

The translation of Humboldt’s Kosmos [Cosmos (1846–58)] is delayed.

Gives instances of peculiar genera with several good species in very small islands. Scarcity of insects on islands.

JDH cannot prove that there is much hybridising, but does not see why there should not be. "Bother variation, development & all such subjects, it is reasoning in a circle I believe after all."

On marking and shipment of fossils.

Has met the artist, J. M. Rugendas.

Discusses British and French relations with Rosas government [of Argentina].

Raises some points for revision of CD’s Journal of researches.

Southern island floras. "The more I ponder upon Insular Floras the less inclined I am to admit the mutation of species to any very great amount."

Notes the islands, where known, on which CD’s Galapagos beetles were found. Remarks that in none of the species whose place of origin is known, does he have specimens from more than one island.

Informs CD about characteristics of certain species of Galapagos birds.

Discusses colour of Zenaida from the Galapagos.

Discusses names and distributions of Pacific shells. [Lists by CD and Edward Forbes record names and ranges of shells collected by HC in the Galapagos.]

Answers CD’s queries about the number and distribution of species in certain fish genera.

CD’s criticism of his book [Travels in North America (1845)].

Compares invertebrate animals of Tasmania and England.

Mentions views of C. J. F. Bunbury on climate of the Carboniferous period.

Robert Brown says Australian flora has the widest range.

JDH’s grandfather’s death.

Collecting testimonials for the Edinburgh chair.

The most experienced botanists argue for the "validity of species in nature". Against taxonomic "splitters".

CD’s Cape Tres Montes plants.

Thanks for Journal of researches.

Puzzled over pea flower from Cape Tres Montes.

Thinks species a fair and most profitable subject for discussion, but has no formed opinion of his own.

Sends a list of the work he feels should be done at Beesby [Lincolnshire] to put the farm in order. Hopes to get purchase deeds completed by 10 October.