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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/17/282" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter, from William Henry Fox Talbot to Sir John Herschel, dated at 44 Queen Anne St.</dc:title>
  <dc:description>Autograph letter signed by sender. Wants to withhold description of 'developing' process until it is perfected to obviate others using it. Also refers to second process to make 'positive' and 'negative.'</dc:description>
  <dc:date>11 February 1839</dc:date>
</rdf:Description>