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To W. D. Fox   19 March [1855]


Asks WDF to observe at what age pigeons have tail-feathers sufficiently developed to be counted.

CD is hard at work on his notes for a book with all the facts "for & versus" the immutability of species.

Asks for a young chicken and a nestling common pigeon.

Author:  Charles Robert Darwin
Addressee:  William Darwin Fox
Date:  19 Mar [1855]
Classmark:  Christ’s College Library, Cambridge (MS 53 Fox 87)
Letter no:  DCP-LETT-1651

To the Royal Society   19 March 1855


Recommends publication of Leonard Horner’s account of researches in alluvial deposits of Egypt [Philos. Trans. R. Soc. Lond. 145 (1855): 105–38]. It contains valuable observations which will probably become of still higher value in future.

Author:  Charles Robert Darwin
Addressee:  secretary of Royal Society
Date:  19 Mar 1855
Classmark:  The Royal Society (RR2: 111)
Letter no:  DCP-LETT-1650
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