<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/17/210" 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 G. Wharton Simpson to Sir John Herschel, dated at Canonbury</dc:title>
  <dc:description>Autograph letter signed by sender. Wishes to ascertain certain facts for article on history and aspects of photography. Especially, asks where to find first record of John Frederick William Herschel and [Louis] Daguerre using hyposulfite of soda for fixing photographs.</dc:description>
  <dc:date>12 May 1866</dc:date>
</rdf:Description>