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Darwin, C. R. in correspondent 
Williamson, W. C. in correspondent 
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DCP-LETT-985

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

DCP-LETT-1149

From:
Charles Robert Darwin
To:
William Crawford Williamson
Date:
31 Jan [1848]
Source of text:
Kōbunzo (dealers) (Mr Sorimachi, bookseller, Tokyo) (no date)
Summary:

Thanks WCW for his article ["Microscopical objects found in mud of Levant", Mem. Lit. & Philos. Soc. Manchester 2d ser. 8 (1848):1–128]. Comments on it; offers to send Ascension Island specimens. Urges WCW to re-examine coal-beds for Infusoria to determine whether intervening beds were deposited by sea-, brackish, or fresh water.

Contributor:
Darwin Correspondence Project

DCP-LETT-1156

From:
Charles Robert Darwin
To:
William Crawford Williamson
Date:
12 Feb [1848]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

CD cannot find the lagoon-island mud that WCW asked about, but he sends other geological specimens he hopes will be interesting.

Contributor:
Darwin Correspondence Project
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