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Thomasson, J. P. in correspondent 
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From:
Charles Robert Darwin
To:
John Pennington Thomasson
Date:
3 Nov 1873
Source of text:
Hull University Archives (Thomasson family papers: U DX163/1)
Summary:

Thanks for the paragraph, which he had not seen and now returns.

Contributor:
Darwin Correspondence Project
From:
John Pennington Thomasson
To:
Charles Robert Darwin
Date:
23 Mar 1875
Source of text:
DAR 178: 109
Summary:

On nesting habits of pied and spotted flycatchers.

JPT disagrees with CD’s comment in Descent.

Marriages of first cousins produce congenital deaf-mutism.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Pennington Thomasson
Date:
30 Mar 1875
Source of text:
The British Library (Surrogate RP 8876(i))
Summary:

Seems to be in error about the nests of the two flycatchers.

Contributor:
Darwin Correspondence Project