CD makes progress with barnacles. Describes "supplemental" males in detail. In working out metamorphosis, their crustacean homologies followed automatically.

CD opposes appending first describer’s name to specific name.

Hugh Falconer’s misbehaviour.

Waiting out rains at Brian Hodgson’s.

Will make botanical transverse section of Himalayas from plains to snow.

Arrangements to pass Sikkim Rajah’s territory.

No evidence of glacial or diluvial action in sub-Himalayan mountains. No evidence of detrital coal formation.

Hodgson’s replies to CD on introduced species and hybrids.

Thanks for note and enclosure. Has written to [David?] Landsborough to say dried specimen was just what he wanted. Would like some more in spirits.

Very unwell.

Thanks LA and sends thanks to A. A. Gould for specimens. Describes principal findings of his research on cirripedes. Is obliged for information Joseph Leidy gave about cirripede eyes. Describes anatomical features and chief aspects of growth. Describes discovery of parasitic males and a species parasitic upon other cirripedes.

Obliged for drawings and coins. Cannot tell what the stone is.

Discusses his account. Mentions death of his father and his own inheritance.

Thanks JWL for the use of a schoolroom.

Arranges to meet JWL’s son [John] to discuss use of microscope.

Mentions illness.

Thanks JWL for his paper ["Shooting stars", London Edinburgh & Dublin Philos. Mag. 32 (1848): 81–8, 170–2; 35 (1849): 356–7].

Testimonial recommending B. Waterhouse Hawkins [for a teaching post].

Obliged for account of change in quality of wool. "Some authors will not admit that climate has any perceptible action."

Hopes his health is re-established.

He can distinguish varieties of guinea-fowl as soon as birds are hatched.

Behaviour of Malay hens.

Agrees that naval expeditions to the Arctic are a waste of money. Believes Sir J. Barrow responsible. "Dr [Richard?] King is quite right in the advantage of Land Expeditions".

Thanks for note.

Glad DS sticks to cleavage and foliation question. Bernhard Studer one of few to take correct view on subject.

Pleased at RO’s praise of Coral reefs.

Has read with very great interest RO’s "Report on the archetype" [Rep. BAAS 16 (1846): 169–340]. RO should give name to every letter or number in his woodcuts.

Belittles the loss of a book borrowed from CD.

Acknowledges cheque in payment for purchase of microscope for John Lubbock.

Asks about collection of mollusc specimens he had lent to Richard Owen.

Asks about seeing cirripede collection of the College.

Comments on larva of Scalpellum.

Reports on his father’s health, and Catherine’s. CD, himself, has been a little sick.

Hensleigh [Wedgwood] thinks he has settled the free-will question – "we have none whatsoever".

His health not good.

Has been reading John Evelyn’s Life of Mrs Godolphin, and Mme Sévigné.

Family news. Finds Shrewsbury too noisy.

Anxiety about R. W. Darwin’s health.

Has been unwell but is improving. His father also very ill.