http://www.npg.org.uk/collections/search/portrait/mw40226/Charles-Gordon-Lennox-5th-Duke-of-Richmond-and-Lennox?search=sp&sText=daguerreotype&firstRun=true&wPage=1&rNo=39
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https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjNu9TVkJjKAhXEXD4KHeLhC7sQFggfMAA&url=http%3A%2F%2Fsculpture.gla.ac.uk%2Fview%2Fperson.php%3Fid%3Dann_1278117460&usg=AFQjCNFbeATmAt-dnRDdoe_pYBzjRgG-8g&sig2=_-u8gn