From:
Charles Robert Darwin
To:
John Gould
Date:
[c. Oct 1846]
Source of text:
Cambridge University Library Add 4251: 329
Summary:
Recommends Ernst Dieffenbach for expedition to Guatemala.
Contributor:
Darwin Correspondence Project
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
From:
John Gould
To:
Charles Robert Darwin
Date:
10 May 1866
Source of text:
DAR 84.1: 20–1
Summary:
Gives CD genus and species names of the singular humming-bird; distressed by specific name made necessary by revised laws of nomenclature.
Contributor:
Darwin Correspondence Project
