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Clarke, W. B. (b) in addressee 
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From:
Charles Robert Darwin
To:
William Branwhite Clarke
Date:
25 Oct [1861]
Source of text:
Mitchell Library, Sydney (MLMSS 139/36X, pp. 263–72)
Summary:

Thanks WBC for his account of glacial action in Australia. A mundane cooler period would throw a flood of light on geographical distribution. Has sketched a large MS on subject but does not know whether he will live to publish it.

Questions WBC on striated granite boulders.

Asks him to make a botanical experiment on insect fertilisation.

Contributor:
Darwin Correspondence Project