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From J. D. Hooker   20 February – 16 [March] 1848

Summary

Though correspondence has never ebbed so low, CD is constantly in his thoughts.

Observations on cheetahs used as domesticated hunting animals.

Finds geographical barriers sometimes separate species, but also finds species that remain separate where there are no barriers to migration.

Colour "individuates" isolated animal species.

Plains and alpine animal distribution show altitude not strictly analogous to latitude.

Impact of timber cutting on climate has led to extinction of crocodiles.

Will discuss coal formation in letter to Edward Forbes.

CD often asked whether isolated mountains in southern latitudes had closely allied representatives of Arctic and north temperate plants; JDH has found a representative barberry.

Making for Darjeeling via Calcutta.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  20 Feb – 16 [Mar] 1848
Classmark:  Royal Botanic Gardens, Kew (India letters 1847–51: 52–4 JDH/1/10)
Letter no:  DCP-LETT-1158

From J. D. Hooker   24 July [1848]

Summary

Brian Hodgson reading CD’s Journal of researches with delight.

Forwarding breeding pamphlets.

JDH recommends P. S. Pallas on degeneration.

CD’s facts on sex in barnacles startling.

Hugh Falconer’s health.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  24 July [1848]
Classmark:  Royal Botanic Gardens, Kew (India letters 1847–51: 94 JDH/1/10)
Letter no:  DCP-LETT-1193

From J. D. Hooker   13 October 1848

Summary

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.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  13 Oct 1848
Classmark:  Royal Botanic Gardens, Kew (India letters 1847–51: 112–14 JDH/1/10)
Letter no:  DCP-LETT-1203
Document type
letter (3)
Author
Hooker, J. D.[X]
Addressee
Correspondent
Date
1848
02 (1)
07 (1)
10 (1)
letter