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1860-1869 in date 
Watson, H. C. in correspondent 
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From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
[3? Jan 1860]
Source of text:
DAR 47: 135–8
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.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Hewett Cottrell Watson
Date:
[5–11 Jan 1860]
Source of text:
DAR 47: 136a (verso); The University of Edinburgh Centre for Research Collections (Lyell collection Coll-203/A3/5: 77–87)
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
10 May 1860
Source of text:
DAR 47: 160–1
Summary:

Returns reviews of Origin.

F. J. Pictet [Arch. Sci. Phys. & Nat. n.s. 7 (1860): 231–55] goes further than he himself realises.

Naturalists will resist CD’s views until faith in certain "impassable" barriers between existent species is shaken.

Gives CD an instance of convergence.

Contributor:
Darwin Correspondence Project
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From:
Hewett Cottrell Watson
To:
George Gordon
Date:
19 Sept 1860
Source of text:
Elgin Museum (Gordon Archive 60.15)
Summary:

HCW thanks GG for responding so promptly to CD’s application for assistance.

Wonders whether natural selection can operate to the extent CD contends.

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Joseph Dalton Hooker
Date:
4 Jan 1861
Source of text:
Royal Botanic Gardens, Kew (Directors’ Correspondence 105: 205)
Summary:

Comments on the travels of JDH.

Genera plantarum a most worthy undertaking.

Criticisms of the Darwin–Hooker understanding of HCW’s views of convergence.

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
George Gordon
Date:
27 June 1861
Source of text:
Elgin Museum (Gordon Archive 61.9)
Summary:

Regrets he cannot assist the fulfilment of CD’s request for a specimen of the orchid Corallorhiza.

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
John Hutton Balfour
Date:
1 July 1861
Source of text:
Royal Botanic Garden, Edinburgh
Summary:

Asks whether one of Balfour’s students could obtain specimens of Corallorhiza from Ravelrig bog outside Edinburgh for CD.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Hewett Cottrell Watson
Date:
[17 July 1861]
Source of text:
DAR 185: 49
Summary:

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

Polymorphic genera.

Contributor:
Darwin Correspondence Project
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From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
24 July 1861
Source of text:
DAR 181: 38
Summary:

Distribution of varieties and subspecies.

George Maw’s review of the Origin [Zoologist 19 (1861): 7577–611].

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
[after 24 July 1861]
Source of text:
DAR 47: 162
Summary:

Gives CD an instance of facts that can be read either way as to whether a plant (Veronica humifusa) is a species or a variety.

Contributor:
Darwin Correspondence Project
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From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
20 Sept 1861
Source of text:
DAR 181: 39
Summary:

The Primula experiments of J. Sidebotham; HCW’s distrust of the results [see J. Sidebotham, "Specific identity of the cowslip and the primrose", Phytologist 3 (1849): 703–5].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Hewett Cottrell Watson
Date:
8 [Aug 1862]
Source of text:
Archives of the Museum of Comparative Zoology, Ernst Mayr Library, Harvard University (bMs 7.10.2)
Summary:

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

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
[16 May 1864]
Source of text:
DAR 142: 94
Summary:

Cover containing some seeds mentioned in the letter to H. C. Watson, 28 May [1864], f.2 (S 4512).

Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
[20 May 1864]
Source of text:
DAR 142: 95
Summary:

Taeas [?] allied to L. hyssopifolia. [Cover containing packets of seed specimens.] Mentioned in the letter to H. C. Watson, 28 May [1864], f.2 (fS 4512).

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Hewett Cottrell Watson
Date:
28 May [1864]
Source of text:
DAR 185: 51
Summary:

Thanks HCW for Lythrum specimens.

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

Contributor:
Darwin Correspondence Project
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From:
Hewett Cottrell Watson
To:
Joseph Dalton Hooker
Date:
1 Jan 186[8]
Source of text:
Royal Botanic Gardens, Kew (Directors’ Correspondence 105 f. 222
Summary:

HCW’s criticisms of CD’s theory.

Contributor:
Darwin Correspondence Project