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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/6/385" 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 Augustus De Morgan to Sir John Herschel, dated at 91 Adelaide Road</dc:title>
  <dc:description>Autograph letter signed by sender. Thanks for letter. Has just turned 60 himself. Does not like the sound of the bronchitis. Wife thanks him for the pamphlet on Force. It is a dreadful puzzle. Philosophers must deny the existence of things they do not understand. Family members are at Walmer. Gives examples of mistakes being copied. Encloses two riddles.</dc:description>
  <dc:date>17 August 1866</dc:date>
</rdf:Description>