[Notes on conversations with J. D. Hooker.] Geographical distribution; diffusion and distribution of species. Island and mountain floras; means of migration (high-roads, icebergs).
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[Notes on conversations with J. D. Hooker.] Geographical distribution; diffusion and distribution of species. Island and mountain floras; means of migration (high-roads, icebergs).
Thanks for pleasant stay at Down.
Remarks on boulders found on southern islands.
Describes the alpine character of the Andes flora and relays information on other mountain floras.
Quotes instances of seeds that retained their vitality after being carried by ocean currents.
Sends notes on the comparative floras of New Zealand, Australia, and west coast of South America.
Encloses a copy of part of a letter from George Gardner in Ceylon concerning the European character of the mountain flora.
Returns notes on mule yaks [see Natural selection, p. 438]
and sends queries on silkworms.
A bed is ready any time HF will come.
Regularly attends Owen’s lectures. Owen at pains to show groups are not linked. Thus makes Lepidosiren appear fish-like.
GRW thinks embryology will become chief guide to insect classification. But contradictions between classification based on embryological and adult characters do occur.
Writes about canal shares EAD holds as trustee.
Sends calculations of angles of elevation [of sea-bottom, for South America?].
Swale has sent Lady Willoughby’s diary, which EAD will forward to CD.
Queries on ratios of species to genera on southern islands. CD’s observations on distribution of Galapagos organisms, and on S. American fossils, and facts he has gathered since, lead him to conclusion that species are not immutable; "it is like confessing a murder".
C. G. Ehrenberg would like some earth from Galapagos, Tierra del Fuego, and the Falklands; wishes to hunt for Infusoria.
Remarks on geographical divisions of the flora of the Southern Hemisphere.
JDH beginning Galapagos plants. Value of studying insular floras with respect to inquiries about adaptation of species.
Thanks for information for Ehrenberg.
Has just completed Volcanic islands.
Sends queries on Galapagos flora in particular and island floras in general; also on relationship of wide-ranging species to wide-ranging genera.
Regrets the delay in sending copies of his paper.
Island floras; relationships with mainland. Ranges of species in mundane genera.
Galapagos plants one-third done.
Affinity of Galapagos with nearest Pacific islands. Relationship between ranges of species in time and space. Comparison of Malden Island and Galapagos plants. Affinities of Oceania plants with continental floras.
Thanks for information on Malden Island. Comments on its plants and their relationship to the Galapagos flora. Discusses the flora of Oceania. Gives his opinion on the extent of the uniformity in species and forms amongst South Sea Islands. Large genera are more widely diffused and have a larger proportion of species with wide ranges.
Seeks advice on expense of preparing plates [for Flora Antarctica].
Advice to JDH on problems of printing and publishing.
Remarks on differences of species between islets of Galapagos group.
Asks JDH to forward publishing information to J. E. Gray.
Has received JDH’s infusorial specimens for Ehrenberg.
Writes to correct a statement made in his 1837 paper "On the formation of mould" [Collected papers 1: 49–53]. He should have said that marl was put on the field 30 years ago, not 80. Observations made on a visit to the field showed that worms had undermined the marl spread on the field at a faster rate than previously reported.
Thanks for JDH’s interesting details about the Galapagos.
Clarification of CD’s query about the relationship between the range of a genus and the ranges of its constituent species.
Answer to CD’s query on genera and species ranges.
Comments on typical forms.
Preparing first part of Galapagos plants for printing.