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<rdf:Description rdf:about="https://archives.ucl.ac.uk:443/CalmView/record/catalog/HALDANE/5/2/1/191" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Durman, N C</dc:title>
  <dc:description>Letter from N C Durman to Haldane regarding the four colour map theorem as outlined by Haldane in Science and Everyday Life. Includes a typescript essay on Durman's prposed proof of the four colour theorem and three cards showing diagrams to accompany the essay.</dc:description>
  <dc:date>29 Oct 1949</dc:date>
</rdf:Description>