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To H. C. Watson   [5–11 January 1860]

Summary

Discusses the possibility of "convergence" occurring; believes it could be only very limited.

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  [5–11 Jan 1860]
Classmark:  Kinnordy MS, Charles Lyell’s journal V, pp. 77–87; DAR 47 (ser. 2): 136a (verso)
Letter no:  DCP-LETT-2639

DCP-LETT-3211A

Summary

Expresses his wish for a discussion of the geographic distribution of closely allied species. [3218.]

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  
Classmark:  Texas Tech University Library, Lubbock, Texas, tipped into a first edition of Origin (QH365 .O2 1859)
Letter no:  DCP-LETT-3211A

To Hewett Cottrell Watson   8 [August 1862]

Summary

Asks HCW’s help with his experiments on Lythrum salicaria, for which he needs flowers of the rare Lythrum hyssopifolia.

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  8 [Aug 1862]
Classmark:  Archives of the Museum of Comparative Zoology, Ernst Mayr Library, Harvard University (bMs 7.10.2)
Letter no:  DCP-LETT-3646

To Hewett Cottrell Watson   28 May [1864]

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Summary

Thanks HCW for Lythrum specimens.

CD has at last finished his Lythrum paper. ["Three forms of Lythrum", Collected papers 2: 106–31.]

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  28 May [1864]
Classmark:  DAR 185: 51
Letter no:  DCP-LETT-4512

To Hewett Cottrell Watson   [17 July 1861]

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Summary

Difficulty of distinguishing varieties and species. Did HCW suggest a printed list that might help?

Polymorphic genera.

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  [17 July 1861]
Classmark:  DAR 185: 49
Letter no:  DCP-LETT-1616

To H. C. Watson   [26 August 1855]

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Summary

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

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  [26 Aug 1855]
Classmark:  DAR 185: 53
Letter no:  DCP-LETT-1750

To H. C. Watson   [after 10 June 1856]

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Summary

Do the plants that are common to Europe and North America nearly all live north of the Arctic Circle? CD bases his question on HCW’s "capital" comparison between relations of Europe to North America and Europe to E. Asia if the intervening land had been submerged. CD has been led to speculate that in the mid-Pliocene the organisms now living in middle Europe and northern U. S. lived within the Arctic Circle. Subsequent movements of this flora with advance and retreat of glaciers would explain present distribution better than Forbes’s vast submergences.

Author:  Charles Robert Darwin
Addressee:  Hewett Cottrell Watson
Date:  [after 10 June 1856]
Classmark:  DAR 185: 52
Letter no:  DCP-LETT-1899

From H. C. Watson   19 November 1856

Summary

Discusses means of seed transport.

Considers the difficulty of deciding which, if any, botanical species are real.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  19 Nov 1856
Classmark:  DAR 98: A7–A10
Letter no:  DCP-LETT-1994

From H. C. Watson   26 November 1856

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Summary

Responds to CD’s query on Subularia and Limosella. There are discrepancies among authorities on whether Subularia flowers out of water. Limosella certainly flowers out of water.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  26 Nov 1856
Classmark:  DAR 207: 19
Letter no:  DCP-LETT-2002

From H. C. Watson   [28 December 1856]

Summary

Notes on the comparative rarity of intermediate forms between species, and the varying relationships those forms may have to one or both species between which they are intermediate.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  [28 Dec 1856]
Classmark:  DAR 98: A15–18
Letter no:  DCP-LETT-2023

From H. C. Watson   10 March 1857

Summary

HCW is trying to define what CD means by "variable" genera.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  10 Mar 1857
Classmark:  DAR 181: 35
Letter no:  DCP-LETT-2063

From H. C. Watson   14 June [1857]

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Summary

Sends a reference to Subularia which bears on a query CD made some time ago [see 2002]. Subularia was seen to flower in the air in a remarkably dry season.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  14 June [1857]
Classmark:  DAR 207: 20
Letter no:  DCP-LETT-2106

From H. C. Watson   14 December [1857]

Summary

Will shortly return CD’s list of varieties of British plants. Discusses the situations in which different varieties of species are often found and the ranges of varieties relative to those of the species.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  14 Dec [1857]
Classmark:  DAR 98: A11–12
Letter no:  DCP-LETT-2183

From H. C. Watson   20 December [1857]

Summary

Finds he cannot annotate CD’s list of subspecies and varieties as wanted. Mentions again his difficulties with "species"; he "cannot find the proof of species being definite and immutable whatever they may seem to be at any one time and spot".

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  20 Dec [1857]
Classmark:  DAR 98: A13–14
Letter no:  DCP-LETT-2190

From Hewett Cottrell Watson   3 January 1858

Summary

Discusses the ranges and distribution of varieties relative to the type species.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  3 Jan 1858
Classmark:  DAR 98: A19–20
Letter no:  DCP-LETT-2199

From H. C. Watson   23 February [1858]

Summary

Believes that botanists tend to mark more varieties in large than in small genera, but notes that where many varieties of a species exist these varieties may well be passed over, whereas similar varieties of another species which are fewer in number may well be recorded.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  23 Feb [1858]
Classmark:  DAR 98: A21–2
Letter no:  DCP-LETT-2223

From H. C. Watson   23 March 1858

Summary

Discusses the ranges of species in large and small genera; difficulties involved in limiting the discussion to Britain.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  23 Mar 1858
Classmark:  DAR 98: A23–4
Letter no:  DCP-LETT-2245

From H. C. Watson   21 November [1859]

Summary

Believes natural selection will become recognised as an established truth in science, though it will shock the ideas of many men.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  21 Nov [1859]
Classmark:  DAR 98: B9–10
Letter no:  DCP-LETT-2540

From H. C. Watson   30 November [1859]

Summary

Sends a correction for Origin reprint.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  30 Nov [1859]
Classmark:  DAR 181: 37
Letter no:  DCP-LETT-2562

From Hewett Cottrell Watson   [3? January 1860]

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Summary

Notes by HCW on the Origin dealing especially with divergence and convergence. Believes there is some natural tendency to converge into groups in opposition to divergence generated by natural selection.

Author:  Hewett Cottrell Watson
Addressee:  Charles Robert Darwin
Date:  [3? Jan 1860]
Classmark:  DAR 47: 135–8
Letter no:  DCP-LETT-2636
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letter (40)
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Correspondent
Darwin, C. R.[X]
Watson, H. C.[X]
Date
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1855 (8)
1856 (8)
1857 (4)
1858 (4)
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