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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
10 Aug [1855]
Source of text:
DAR 114: 144
Summary:

Morning with H. C. Watson; discussed problems of inferences from buried seeds.

Contributor:
Darwin Correspondence Project
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From:
John Cattell
To:
Charles Robert Darwin
Date:
13 Aug 1855
Source of text:
DAR 161: 127
Summary:

Gives names of German dealers who provide seed of superior quality.

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
13 Aug 1855
Source of text:
DAR 98: A5–A6, DAR 9: 15A
Summary:

Is having difficulties marking close species on the list of British plants.

In all his attempts to advance geographical botany he is stopped by the "application and signification of the word ""species"" " the use of which is both "indefinite and variable". He encloses his list of "Categories of Species".

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
14 [Aug 1855]
Source of text:
DAR 114: 145
Summary:

When JDH goes to Germany, will he ask seed men if their marvellous true breeding lines are the result of selection.

Contributor:
Darwin Correspondence Project
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Text Online
From:
Richard Owen
To:
J. S. Henslow
Date:
15 August 1855
Source of text:
Cambridge University Library MS Add. 8177: 230
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
17 Aug 1855
Source of text:
DAR 181: 28
Summary:

Sends a catalogue of plants [missing] with the close species marked.

Contributor:
Darwin Correspondence Project
Text Online
From:
Sir B. Brodie
To:
J. S. Henslow
Date:
20 August 1855
Source of text:
Cambridge University Library MS Add. 8177: 35
Summary:

Writes regarding additions to Brodie’s local village library by JSH’s daughter and sister, together with JSH’s recent visit to his estate, Broome Park, Surrey.

Contributor:
Henslow Correspondence Project
From:
Edward Blyth
To:
Charles Robert Darwin
Date:
22–3 Aug 1855
Source of text:
DAR 98: A79–A84
Summary:

Gives extracts from a letter by Thomas Hutton.

Rabbits are kept (generally by Europeans) in the NW. provinces and breed freely. Canaries are not well adapted to the climate. Reports on domestic cats and pigeons of the area. EB gives references to further information on cats, pigeons, and silkworms.

[CD’s notes are an abstract of this letter.]

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
John Stevens Henslow
Date:
23 [Aug or Sept] 1855
Source of text:
DAR 93: A112–13
Summary:

Asks JSH to identify an umbellifer.

Describes his efforts to compare number of seeds of wild and cultivated plants.

Asks that more wild celery be collected and seeds counted. Seeks to verify whether "most typical form produces most seed" and whether cultivation lessens fertility.

Contributor:
Darwin Correspondence Project
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From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
23 Aug 1855
Source of text:
DAR 181: 29
Summary:

Close species in large and small genera.

Artificiality of botanical classification.

Contributor:
Darwin Correspondence Project
Text Online
From:
Sir B. Brodie
To:
J. S. Henslow
Date:
24 August 1855
Source of text:
Cambridge University Library MS Add. 8177: 36
Summary:

Writes positively about a report on schools written by JSH, particularly the benefits for children of learning by rote. Says he is unsurprised that JSH has some ‘bad folks’ among allotment scheme as this is human nature.

Contributor:
Henslow Correspondence Project
Text Online
From:
William Wilson
To:
J. S. Henslow
Date:
25 August 1855
Source of text:
Cambridge University Library MS Add. 8177: 357
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
Charles Robert Darwin
To:
Hewett Cottrell Watson
Date:
[26 Aug 1855]
Source of text:
DAR 185: 53
Summary:

On geographical distribution of plants. Plant systematics and natural classification.

Contributor:
Darwin Correspondence Project
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Text Online
From:
J. E. Gray
To:
J. S. Henslow
Date:
3 September 1855
Source of text:
Cambridge University Library MS Add. 8177: 161
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
Edward Blyth
To:
Charles Robert Darwin
Date:
7 Sept [1855]
Source of text:
DAR 98: A51–5
Summary:

Comments on the ease with which different species of Felis can be tamed.

Asian species of wild cattle.

Variation in colour of jackals.

Discusses the difficulties of differentiating between varieties and species. EB recommends Herman Schlegel’s definition of species [in Essay on the physiognomy of serpents, trans. T. S. Traill (1843)]. Problems of defining species of wolves and squirrels. Pigeons and doves afford an illustration of "clusters of species, varieties, or races". Various pigeons have local species in different parts of India and Burma, some of which interbreed where their ranges cross; as do the local species of Coracias [see Natural selection, p. 259].

[CD’s notes are an abstract of this memorandum.]

Contributor:
Darwin Correspondence Project
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Text Online
From:
William Wilson
To:
J. S. Henslow
Date:
17 September 1855
Source of text:
Cambridge University Library MS Add. 8177: 358
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
Edward Blyth
To:
Charles Robert Darwin
Date:
[22 Sept 1855]
Source of text:
DAR 98: A85–A92
Summary:

Gives extract from a letter from Capt. R. Tickell: rabbits are not bred by the Burmese; common European and Chinese geese are bred but have probably only recently been introduced.

EB gives references to works illustrating the dog-like instinct of N. American wolves.

Discusses reason and instinct; ascribes both to man and animals. Comments on various instincts, e. g. homing, migratory, parental, constructive, and defensive. Reasoning in animals; cattle learning to overcome fear of passing trains.

Hybrid sterility as an indication of distinct species. Interbreeding as an indication of common parentage.

Enlarges upon details given by J. C. Prichard [in The natural history of man (1843)].

Adaptation of the two-humped camel to cold climates. Camel hybrids.

Doubts that domestic fowl or fancy pigeons have ever reverted to the wild.

Feral horses and cattle of S. America.

Believes the "creole pullets" to be a case of inaccurate description.

Variations in skulls between species of wild boar.

Pigs are so prolific that the species might be expected to cross.

Milk production of cows and goats.

Sheep and goats of lower Bengal.

Indian breeds of horses.

Variation in Asiatic elephants.

Spread of American tropical and subtropical plants in the East.

EB distinguishes between races and artificially-produced breeds.

[CD’s notes are an abstract of this memorandum.]

Contributor:
Darwin Correspondence Project
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Text Online
From:
Leonard Horner
To:
J. S. Henslow
Date:
24 September 1855
Source of text:
Cambridge University Library MS Add. 8177: 175
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
John Rice Crowe
To:
Charles Robert Darwin
Date:
27 Sept 1855
Source of text:
DAR 205.2: 222
Summary:

Forwards two specimens of beans found on north coast of Norway.

Contributor:
Darwin Correspondence Project
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Text Online
From:
Leonard Horner
To:
J. S. Henslow
Date:
27 September 1855
Source of text:
Cambridge University Library MS Add. 8177: 179
Summary:

No summary available.

Contributor:
Henslow Correspondence Project