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Draper, John William in correspondent 
Herschel, John in addressee 
1840-1849::1840 in date 
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From:
John William Draper
To:
Sir John Herschel
Date:
[28 July 1840]
Source of text:
RS:HS 6.501
Summary:

Sending a heliographic portrait taken from life. Comments on his methods.

Contributor:
John Herschel Project