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.

Apologises for being a poor correspondent to [Charles] Darwin [CD] & [Charles] Lyell. At Darjeeling, JDH is staying with [Brian Houghton] Hodgson [BHH]; a Himalayan naturalist. JDH collects beetles. Discusses [Hugh] Falconer's health, work, East India Company pension & bad behaviour; incl. offending the Asiatic Society President, Colvile. For the rainy season JDH has sent out collectors for live plants & is drying them himself. JDH has not been above 10,000 ft but must see that flora to complete a transverse section of the range & its botanical regions. Lord Dalhousie is seeking permission from the Rajah for JDH to go to Sikkim. Permission granted to travel through Nepaul [Nepal] to Tibet passes. In Dec will explore the Terai recording the rocks, plants, climate & zoology. Has formed good idea of the main plants that define the 'central region'. Discusses geology of the region incl terraces & structure of the mountains. Explains composition of the soil, concentrations of organic material & coal deposits- Mueller does the chemical analysis. Discusses elevations of glaciers. Speculates on geology of Kinchin [Kanchenjunga] & the sudden transition from the sub Himal to higher peaks. The Himalayas need to be studied fully to understand their makeup, so far only the North West corner is known, nobody has explored east of the Kemaon [Kumaon]. JDH is anxious to be the first in this terra nova. BHH sends CD some pamphlets to share with Waterhouse. Relates BHH's answers to CD's questions re: climate for seedlings in India, cultivation of European vegetables, tea plants at Cathmandu [Kathmandu], introduction of the Junma goat, interbreeding of Axis medius & Hemitragus quadri-mammis & Yak or Bison with Buffalo to produce zobos, breeding of wild & domesticated fowl & dogs , bulls covering deer like Rusa hippelaphus, the habits of Tussa silk moth. Duel, death & children of Captain C.. Sends wishes to Darwin family, Wsdgewoods, Westwood, Forbes, Lyells, Horners, Owen & Bell.

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.

Gives details of the illness of R. W. Darwin.

Informs CD of the death of their father and the funeral arrangements.

CD fears he must wear Emma with his unwellness and complaints.

Belittles the loss of a book borrowed from CD.

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

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

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].

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

Returns letters [from her son, J. D. Hooker, in India].

Asks that B. H. Hodgson’s zoological pamphlets be sent to him at Athenaeum.