From:
Charles Robert Darwin
To:
William Crawford Williamson
Date:
23 June [1846]
Source of text:
Missouri Botanical Garden Library
Summary:
Does not remember where specimens came from. CD picked fossils most likely to contain Infusoria. Discusses composition of Tertiary strata of South America from which they came. Questions WCW’s statement that they contained siliceous matter.
Contributor:
Darwin Correspondence Project