From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
20 Dec [1857]
Source of text:
DAR 98: A13–14
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".
Contributor:
Darwin Correspondence Project
