Had hoped to sent specimens by carrier that day; intends to sent them next Thursday.

Thanks for German scientific newspaper: two articles interested him.

CD proposes to call for tea if he is well enough on Thursday.

Will return books, and asks for more.

Has altered and added to HES’s list [compiled for Bibliographia zoologiæ et geologiæ, edited by Louis Agassiz and enlarged by HES, (1848–54)].

On zoological nomenclature CD cites a case in which he believes more harm than good would be done by following the rule of priority. Thinks the rule of the first describer’s name being attached in perpetuity to a species has been the greatest curse to natural history. Every genus of cirripedes has a half-dozen names and not one careful description.

Sends a paper he once wrote [missing] on the subject [of zoological nomenclature].

Thanks WJH for information on J. D. Hooker’s progress.

J. D. Hooker promised a copy of his Galapagos paper. Can WJH forward one to the Athenaeum?

HES’s arguments are of great weight, but CD cannot yet bring himself to reject well-known names for obscure ones. Sends four cases that he thinks will stagger HES. Cites his problems in classifying cirripedes. CD cannot bear to give new names, yet may do wrong to attach old ones. Not one species is correctly defined. The harm done by "species mongers".

His memory of his recently deceased father is a treasure to him.

Thanks WDF for information on the water-cure. Dislikes the thought of it.

Reports results of his experiments with tied-up fruit-trees.

Requests JPM’s assistance by lending or giving him cirripede specimens. The anatomy of cirripedes has been most imperfectly done, and their classification is a perfect chaos.

HES’s letter will fructify to some extent: CD will try to be more faithful to rigid virtue and priority. Would not adopt his own notion in cirripede book without prior approval by others. Will not append "Darwin" to any of his species. Feels sure many others share his aversion.

Asks HES’s opinion on retention of generic name Conchoderma.

Asks for account on South America and sales of Coral reefs and Volcanic islands.

Thanks HES for solving his problem. Has some difficulty with HES’s type-species. In arranging genera in a natural order it is often impossible to say which species should be considered the type.

Thanks him for cirripede specimens.

Thanks RO for his note on Conchoderma hunteri [see Living Cirripedia 1: 153].

Has been very unwell; has lost four-fifths of his time. Will go to Malvern to try the water-cure for his vomiting, which regular doctors cannot cure.

Has done some pretty homological work with cirripedes.

Sends detailed report on the prospects for a settlement on the coast of Patagonia, pointing out many problems, and recommending instead the Falkland Islands.

Thanks correspondent for lecture tickets, but regrets he will be unable to attend.

Encloses diagram illustrating difference between Chthamalus and Balanus. Specimens sent. Finds no Chthamalus in WT’s collection.

Has read with much interest WT’s book [The natural history of Ireland, vol. 1 (1849)].

Recommends E. S. Dixon’s book [Ornamental and domestic poultry; their history and management (1848)].

CD is obliged to put off his journey to Paris because of ill-health, but this will give CD more time to study the specimens.

Values HM-E’s opinion on CD’s barnacle work more than any man’s in Europe.

Happy to support LAR’s application to the Royal Society.

Writes a detailed account of his treatment at J. M. Gully’s hydropathy establishment at Malvern.

Reports progress with water-cure. Describes the treatment.