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Clark, J. W. (b) in correspondent 
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From:
Charles Robert Darwin
To:
Joseph Warner Clark
Date:
9 Feb 1875
Source of text:
University of California, Berkeley, The Bancroft Library (BANC MSS 74/78 z)
Summary:

Thanks for information about effect of fear on the iris.

Contributor:
Darwin Correspondence Project
From:
Joseph Warner Clark
To:
Charles Robert Darwin
Date:
25 June 1875
Source of text:
DAR 161: 154
Summary:

Observations of fear in animals marked by dilation of pupils.

Contributor:
Darwin Correspondence Project
From:
Joseph Warner Clark
To:
Charles Robert Darwin
Date:
16 Sept 1875
Source of text:
DAR 161: 155
Summary:

Examples of pupillary dilation.

Contributor:
Darwin Correspondence Project
From:
Joseph Warner Clark
To:
Charles Robert Darwin
Date:
8 Sept 1877
Source of text:
DAR 161: 156
Summary:

An example of inheritance confined to one sex.

Contributor:
Darwin Correspondence Project