From:
Charles Robert Darwin
To:
Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Date:
28 Apr [1871]
Source of text:
Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 1, 1 r)
Summary:
Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
Contributor:
Darwin Correspondence Project