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<p>[QUOTE=&quot;Debora, post: 4250987, member: 1476&quot;]<font size="4">So likely after 1855 (or done on an older canvas.)</font></p><p><i><font size="3"><br /></font></i></p><p><i><font size="3">&quot;...Charles Roberson, a business founded in 1819 and which grew to become one of the leading companies as Charles Roberson &amp; Co from 1855 and Charles Roberson &amp; Co Ltd from 1908 until 1987.&quot; </font></i></p><p><i><font size="3"><br /></font></i></p><p><a href="https://www.npg.org.uk/assets/files/pdf/research/artists_materials_8_Roberson.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.npg.org.uk/assets/files/pdf/research/artists_materials_8_Roberson.pdf" rel="nofollow">https://www.npg.org.uk/assets/files/pdf/research/artists_materials_8_Roberson.pdf</a></p><p><br /></p><p>Debora[/QUOTE]</p><p><br /></p>

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