From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
6–7 Oct [1861]
Source of text:
DAR 115: 116
Summary:
Orchid anatomy.
Contributor:
Darwin Correspondence Project
From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[6 October 1861]
Source of text:
RS:HS 6.348
Summary:
Has sent the packet of letters written to Francis Baily to Greenwich, but kept back one or two including the one on the R.S.L. Secretaryship. Is told that James South is now suffering from deafness. Has sent a paper on errors of observation to Cambridge. Comments on this.
Contributor:
John Herschel Project
Text Online
From:
Darwin, Francis
To:
Darwin, Emma
Date:
[6 October 1861]
Source of text:
DAR 210.6: 75
Summary:
No summary available.
Contributor:
Darwin Family Letters
Text Online
From:
Darwin, G. H.
To:
Darwin, Emma
Date:
[6 October 1861]
Source of text:
DAR 210.6: 74
Summary:
No summary available.
Contributor:
Darwin Family Letters
From:
Charles Robert Darwin
To:
John Gould
Date:
6 Oct [1861]
Source of text:
Cambridge University Library (Add 4251/330)
Summary:
Thanks for JG’s book [An introduction to the Trochilidae, or family of humming-birds (1861)], which he has read carefully. Hopes someday to use the information on the close alliance of species in large genera.
CD repudiates hybridity of birds in nature.
Intends to extract the cases of "races" or doubtful species. They show that "determination of species is not a simple affair".
Contributor:
Darwin Correspondence Project