From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
25 June [1869]
Source of text:
The British Library (Add MS 46434: 186–7); Natural History Museum (Entomology Manuscripts MSS WAL A 1:1 (127-128))
Summary:
On butterfly scales: there are many secondary characters which baffle conjecture.
Was forced to make additions to Origin as short as possible.
Contributor:
Darwin Correspondence Project
