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Bush, John in correspondent 
1860-1869::1868::04 in date 
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From:
Charles Robert Darwin
To:
John Bush
Date:
2 Apr [1868]
Source of text:
Private collection
Summary:

Thanks JB for his information. Has heard of analogous cases to JB’s observations on [colours of] crossed rats; the offspring of white and grey mice are stated to be either white or grey and never piebald.

Contributor:
Darwin Correspondence Project