Summary

Health is improved, but would do anything to get strong again. Is consulting his father; will return to London soon to see B. W. Hawkins.

Will send MS [of Fish, no. 2] to the printer, and be there when LJ comes.

Summary

Asks LJ which British birds are polygamous. His query relates to the possession by the male of secondary sexual characters.

CD is also interested in the numerical proportion of the sexes in birds.

Asks about the use of the horns in male lamellicorn or coprophagous beetles.

Summary

Thanks LJ for his useful facts. Will "look to" the reference about the nightingale.

Summary

Doctors predict it will take years for CD’s constitution to recover.

Summary

Details regarding volume on Fish.

Sends notes on Diodon.

Must give up attending Geological Society evening meetings; knocks him up.

Summary

CD is pleased with LJ’s introduction [to Fish]. He rejoices that he persuaded LJ to undertake this work.

Summary

Glad to hear that LJ will repeat his notes to Gilbert White’s [Natural history of] Selborne [1843] in a separate work.

Critical of G. R. Gray’s attaching his own name to Furnarius cunicularius [in Birds, pp. 65–6]. Strickland’s nomenclature laws are needed to check egoism.

Summary

Is sending fish skins and bottles off to Cambridge Philosophical Society.

Fish numbers [of Zoology], now finished, give CD satisfaction when he doubts whether he ought to have applied for Government money.

Wishes Thomas Bell would finish his part [Reptiles].

CD has just corrected last page of index of Coral reefs.

Summary

Asks whether LJ can throw light on this subject: "What are the checks and what the periods of life by which the increase of any given species is limited?" CD has been driven to conclude that species are mutable; allied species are co-descendants from common stocks.

Summary

On checks to increase of species and the observations which led him to regard species as mutable in form. Would welcome "at some future time" LJ’s criticism of the "sketch" of his conclusions.

Summary

Discusses checks on growth of species population; use of term "mutation" in his species theory. His belief in species mutability.

Summary

Thanks LB for his essay on local biology.

CD with much care and discomfort is now able to work a few hours almost every day.

Summary

Looks forward to LJ’s volume [Observations in natural history (1846)].

Observations on what the world would call trifling points in natural history are always very interesting to him. Deplores their absence in foreign periodicals.

Is slaving away to finish S. American geology.