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Darwin, C. R. in correspondent 
Middleton, R. M. in correspondent 
1870-1879 in date 
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From:
Robert Morton Middleton
To:
Charles Robert Darwin
Date:
22 Oct 1878
Source of text:
DAR 171: 178
Summary:

Did cats and dogs become pets because they are scrupulous in the discharge of their faeces? He has a pet parakeet whose behaviour supports this view.

Contributor:
Darwin Correspondence Project