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Horner, Leonard in correspondent 
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From:
Charles Robert Darwin
To:
Leonard Horner
Date:
[Jan 1847]
Source of text:
DAR 145: 139
Summary:

Responds to LH’s comments on South America.

Discusses inclination of lava stream.

Sketches in second edition of Journal of researches more accurate than in first.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
18 [Mar 1855]
Source of text:
Kinnordy MS (private collection) (Sold at Sotheby’s (dealers), 9 July 2018, lot 373)
Summary:

CD has been a referee for LH’s Nile geology paper [Philos. Trans. R. Soc. Lond. 145 (1855): 105–38]. Praises the work but offers criticism not in his report: Joseph Russegger’s statement about the baked Upper Sandstone deposit cannot be believed; LH’s paper is too long.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
27 Apr [1855]
Source of text:
Kinnordy MS (private collection) (Sold at Sotheby’s (dealers), 9 July 2018, lot 373)
Summary:

Regrets that he has not published his information on superficial beds except in abbreviated form, on p. 143 of Volcanic islands.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
23 Dec [1859]
Source of text:
DAR 145: 140
Summary:

Much pleased that LH approves of Origin.

"Ilkley [Wells] did me extraordinary good."

Wants to know C. J. F. Bunbury’s opinion of Origin.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
[1856–7]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

Thanks LH for memorandum [missing] by K. R. Lepsius.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
14 Feb [1861]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

Variations in nature arise from unknown causes, accidentally or spontaneously, and are preserved by natural selection if beneficial.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
20 Mar [1861]
Source of text:
Sotheby’s (dealers) (9–10 July 2018, lot 374)
Summary:

Comments on LH’s "Anniversary Address of the President", [Q. J. Geol. Soc. Lond. 17 (1861): xxxi–lxxii]. Notes LH’s comments on metamorphism, antiquity of man, and the Bible. Thanks him for his remarks on Origin.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
13 June [1862]
Source of text:
National Library of Scotland (MS.2216:167)
Summary:

Sends condolences on death of LH’s wife. Recalls many pleasant hours in Bedford Place. He and Emma thank LH for sending the memorial paper.

Contributor:
Darwin Correspondence Project
From:
Leonard Horner
To:
Charles Robert Darwin
Date:
7 Apr [1838]
Source of text:
DAR 210.8: 1
Summary:

Postpones meeting with CD because he must attend House of Commons for Factory Amendment Act.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
25 June 1843
Source of text:
American Philosophical Society (Mss.B.D25.31)
Summary:

Sends notes on volcanic islands for LH to read and return.

[Letter could be an inaccurate contemporary copy to which the copyist interpolated details, or a forgery. The address "Down House Orpington Kent" occurs nowhere else.]

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
29 Aug [1844]
Source of text:
American Philosophical Society (Mss.B.D25.38)
Summary:

Thanks Horner for his letter [about Volcanic islands].

Discusses craters of elevation with respect to the views of Leopold von Buch and Élie de Beaumont. Compares Lyell’s views to those of continental geologists. Mentions reading A. D. d’Orbigny [Voyage dans l’Amérique méridionale (1835–47)].

Encloses note from Emma to Mrs Horner, inviting the Horners to visit Down.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
[23 Dec 1846 – Jan 1847]
Source of text:
DAR 145: 138
Summary:

Responds to LH’s comments on South America.

Thinks it unsound to designate a geological epoch after man. Doubts people’s confidence in date of man’s introduction.

Criticises A. D. d’Orbigny’s theory of elevation of the Cordillera.

Lists sections of South America of special interest.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leonard Horner
Date:
[17 Aug – 7 Sept 1846]
Source of text:
American Philosophical Society (Mss.B.D25.53); DAR 145: 136–7 (enclosure)
Summary:

Discusses proposed survey of Glen Roy. Mentions Glen Roy theories of Agassiz and William Buckland. Includes a memorandum calling for a careful survey of the parallel roads of Glen Roy. Mentions M. A. Bravais ["On the lines of ancient level of the sea in Finmark", Q. J. Geol. Soc. Lond. 1 (1845): 534].

Contributor:
Darwin Correspondence Project