"The Correspondence of William Henry Fox Talbot Project has
prepared a comprehensive edition of the nearly 10,000 letters to and
from Talbot (1800-1877), the Wiltshire polymath best known for his
invention of photography. Draft transcriptions of nearly all the letters
were posted by September 2003 and these are now being further annotated
and edited."
http://foxtalbot.dmu.ac.uk/index.html