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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/18/52" 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 Henry Warburton to Sir John Herschel, dated at 45 Cadogan Place</dc:title>
  <dc:description>Autograph letter signed by sender. Thanks for citing (18 months ago) John Brinkley's paper on 'General Term.' Heard that Augustus De Morgan notified John Frederick William Herschel of deductions Henry Warburton drew from Brinkley's theorems, extending them into permutations and combinations. Re-read John Frederick William Herschel's ['On the Development of Exponential Functions' (1816)]. Asks where to buy John Frederick William Herschel's Examples in Finite Differences [1820] for Henry Warburton's great-nephew [Howard Elphinstone].</dc:description>
  <dc:date>28 January 1850</dc:date>
</rdf:Description>