Thanks WJH for information about J. D. Hooker; CD was very anxious to hear something about his safety.

Encloses a letter from J. D. Hooker [see 1257], thinking that WJH would like to see it.

Has left a book from Henslow for JDH at Athenaeum.

When Asa Gray wrote, did he send marked sheets [of his Manual of botany]?

Has just made out "new & wonderful" specific character between two of his pigeon breeds.

Asks GB for help in clearing up his problems about Leguminosae, in connection with his "wild bit of speculation on the crossing of plants" [see Natural selection, p. 71].

Thanks GB for information on Leguminosae, especially about those with apetalous flowers and almost without anthers.

Thanks GB for information on apetalous flowers. "The whole order [Leguminosae] will remain my detestable enemies."

Thanks GB for his help on naturalised plants; comments on spreading of plants.

Wants to quote GB on the names of species and varieties of Silene on which C. F. von Gärtner experimented.

Thinks GB will be disappointed in his book [Natural selection]. "It will be grievously too hypothetical."

For his studies on fertility of crosses, asks GB to mark a list of pairs of Cucubalus as to whether they are varieties of the same species, or distinct species.

Thanks GB for his answers [to 2184], which were as explicit as he expected. Cucubalus viscosus and italicus are extremely sterile together; all other forms extremely fertile. Other instances of infertility found by Gärtner.

Asks GB to vote for "a distant connexion of mine" at Athenaeum, and to mention this to Hooker.

Thanks WJH for an extract on seed transport by sea. [Letter sent with 2314.]

At Hooker’s request, sends his copy of Gärtner [Bastarderzeugung (1849)], "shamefully scribbled over".

Spoke too harshly about CD’s involvement in nomenclatural reform.

JDH used to think CD "too prone to theoretical considerations about species", hence was pleased CD took up a difficult group like barnacles. CD’s theories have progressed but JDH not converted. Sikkim has not cleared up his doubts about CD’s doctrines.

Argument with Falconer.

Falconer’s misbehaviour.

Geology of Khashia [Khasi] mountains. Speculations on mountain building and origin of Himalayas.

No summary available.

Watercolour sketch map of Sikkim by JDH, showing his route through the country to the Tibetan passes. The following are marked on the map and key: Thibet, Lachen Pass over Kongra Lama, Lachen Pass over Donkiah Mt Chomiomo, Cholamo lakes Mt Donkia 23175 ft. Mt Kanchan--Zhow, Tungu, Samdong, Lachong?, Tunkra Mt, Choongtam, Black Rock, Kankola Pass, Choombi river, Chola, Boundary of Sikkim, bridge on Lachoong where Kinchin [JDH's dog] was drowned Aug 15.

Hand drawn map of Sikkim by Joseph Hooker, with the following marked: Thibet, Cholamo Plains, Lachen Pass over Kongra--Lama, Lachoong Pass over Donkiah, High Table Land of Thibet, Chomiomo, Kanchin--jhow, Lakes, Chumalari, Tungu, Lachen, Samdong, Lachoong, Kinchin--junga [Kanchenjunga], Tunkra Mts, Lachen village, Lachong, Jongri, Pundeem, Choongtam, Nursing, Black Rock, Kankola Pass, Kunglo, Ratong, Tumlong Chola Residence of Rajah, Choombi River, Pemiongchi, Manom, Tendong, Tonglo, Darjeeling.

JDH's rough sketch map of 2 Routes from Darjeeling to Tibetan Passes. Hand drawn map with the following marked on it: Walanchoong Pass, Kanglachema Pass, Darj[eeling]., Lachen Pass, Chumabii, High Table Land. Of Thibet [Tibet], Powhunni, Wallanchoong, Yangma, Lachen Pass, Lachoong Pass, Tambur, Yangma, Pass, Nango Mt., Jumnoo, Kamblachen, Kubroo,Kinchin--junga [Kanchenjunga], Lachen, Lelyp, Talloong, Choonjerma Pass, Yalloong, Jongri, Pundeem, Choongtam, Mywa Guola, Chorang, Rotong, Nursingh, Lachong, Tambur, Khabili, Singalelek, Rungbo, Pemiongchi, Kullait, Manom, Singtam Tumlong, Thibet., Hinwa, Jwa, Ruttoo, Gt Rungeet, Teesta, Sankyazung, Phulloott, Rumman, Tundong, Nangki, Tonglo, Little Rungeet, Route 1849, Poona, Mai, Goong, Darjeeling Teesta, Tumlong Residence of Rajah.

No summary available.

No summary available.