Returns "excellent" MS in which CD favours hybrid origin of domestic dog, which CL believes strengthens case for common progenitor of wild species.

Doubts CD’s authorities for antiquity of dingo.

Variation will raise many points for investigation.

"Leporine" hare–rabbit hybrid should be investigated.

Has re-read passages in Origin that CD suggested.

Annals of Natural History would probably reprint Gray’s review of Origin at their own expense.

CD’s thought that modern reptiles could not develop into existing Mammalia but only into another high form is a "grand notion" compatible with "the infinite capacity of the creative power".

Comments on New Guinea marsupials.

Still thinks that the Australian genera and species are so well fitted for extraordinary droughts that they would get the better of the dingo.

Suggests that once there were more races of man, though from common stock. Competition and then hybridity checked divergence.

Falconer’s views on elephant classification. CL attaches little value to Falconer’s objection that mastodons and elephants do not come in chronologically, as they should in CD’s view.

Fears that multiple origin of the domestic dog will be extended to mammals or man. Believes, with Hooker, that whatever occurs in domestication is possible in nature.

Expects lack of diversification of immigrant mammals on long isolated islands will come to show slowness of selective change.

Asks whether CD has speculated on turtles becoming terrestrial on remote islands.

Perhaps non-diversification on islands is explained by tiny proportion of variable species. Those that vary on continent may not do so on island.

A. Gray is afraid of objections to Origin from imperfection of fossil record.

His argument with Falconer over the hypothesis of limited modifiability.

Are the bird-like characters of the Apteryx parts not yet suppressed or nascent organs?

Extinctions of ammonites, belemnites, and hippurites are striking. Perhaps ammonites made way for higher cuttle-fish.

Believes hybrid origin of domestic dog would weaken objections to treating white man and negro as species. Are there not many reputed species among the Mammalia more closely related than these races?

Objects not to the term "selection" but to what CD assigns to it. It should not be confused with the "Creative power" behind variation and the "capacity of ascending in the scale of being".

CD would have carried the public more if he had explained adaptations by multiple causes, some unknown and some well known, i.e., natural selection.

Discusses Hooker’s views of extinction on St Helena.

Work on antiquity of man suspended.

Stopped by 11th edition of Principles of geology [1872].

Wonders why the coracoid bone in the flightless Apteryx is so large when the clavicles are reduced. The clavicles are even separate in the ostrich. The large coracoid in reptiles is explained by the connection to the forelimbs.

Discusses the possibility of a land-bridge connecting Biscay with Ireland and the consequent occurrence in southern Ireland of Asturian plants which are absent from England.

Asks if Hooker or anyone has criticised Edward Forbes’ botanical migration of five floras in the British Isles ["On the connexion between the distribution of existing fauna and flora of the British Isles, and the geological changes which have affected their area", Mem. Geol. Surv. G. B. 1 (1846): 336–432].

CL has calculated that elevation and subsidence of certain formations in Sweden and Norway take place at the rate of 2 1/2 feet per century. He now proposes to estimate the age of a bed by including a conjecture that pauses occur in the oscillations in the ratio of 4 periods of stasis to one of movement. Applying this formula to Scotland, the last subsidence and re-elevation would be 590,000 years and the age of the beds with human implements would be 20,000 years.

Satisfied that CD finds his conjectured rate of elevation and long periods of stasis reasonable, even if these periods cannot be estimated. Explaining upheaval by subterranean lava flow makes these pauses plausible. Suspects that mountainous areas move more than lowland and coastal areas. General upheavals or subsidence in Europe in glacial period are unlikely. Believes with Jamieson that there was glacial action in Scotland before its submergence and that it was equally mountainous then. Subterranean upheaval visits different countries by turn. Horizontal Silurian strata must have been submerged and upheaved. Rest has always been the general surface character. Believes, however, that the quantity of late Tertiary movement is against CD’s belief in the constancy of continents and oceans: perhaps since the Miocene period, but not since the Cretaceous.

Thanks for the valuable present, which he is reading as fast as possible. Comments on the work in the light of his own researches. Is glad he put in a note about C. R. Darwin.

Asks for copy of CD’s paper ["Ancient glaciers of Caernarvonshire", Collected papers 1: 163–71]. Gathers that drift of Moel Tryfan is glacial.

Believes Glen Roy roads formed later than submergence of Scotland.

Asks CD’s opinion concerning relative chronology of various glacial deposits, particularly a flint tool find in the Ouse River near Bedford.

Ice could not have formed the blockages in Lochaber unless in every case the water escaped over some col into a contiguous valley on the same watershed, or into the eastern watershed. Supposes that the cols were not land-straits, but the places where the lakes were drained when forced to flow the wrong way.

Suggests that the height of the water which formed the shelves in Glen Roy was determined not by the height of the blocking glacier but by the height of a col. Notes problems in the idea.

Came to Florence on account of the sudden death of Mrs. [Joanna B.] Horner. Thanks for the translation of a book of the Iliad, but thinks only Greek scholars should read it. Has some queries regarding the migration of hippopotomi; can JH supply any facts or references?

Jamieson has revisited Glen Roy and confirmed his theory of glacier lakes.

A. G. More considers CD the most profound of reasoners.

No summary available.

No summary available.

Has been requested by Edward Twisleton of the Public Schools Commission to give evidence in favor of introducing the teaching of the elements of science in schools. Would like to know JH's opinion, and also if he is willing to give evidence.

Defends position he takes on species [in Antiquity of man]. CD overestimates CL’s capacity to influence public. Will not dogmatise on descent of man; prepared to accept it, but it "takes away much of the charm from my speculations on the past". Cannot go to Huxley’s length with regard to natural selection. Responds to CD’s comments on Antiquity of man.

Lyell has received compliments for letting readers draw own inferences [on species question]. Now feels he earlier did Lamarck injustice. [CD’s] substitution of variety-making power for volition [as in Lamarck] in some respects only a change of names.

Thinks Huxley taking on too many responsibilities.

Has been to Osborne on the Isle of Wight to visit Queen Victoria, who had lots of questions about CD.