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<p>[QUOTE=&quot;Richard Arthur, post: 4409652, member: 6375&quot;]I would try <a href="https://www.npg.org.uk/research/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.npg.org.uk/research/" rel="nofollow">https://www.npg.org.uk/research/</a>. Museums and such 99% of the time will not authenticate a valuable painting. That being said they often will give you names of people who do. If you can locate a catalogue raisonne of his works that would be a start. Next find committees that authenticate William Orphen works. Lots of outside sources make claims that they authenticate, be aware that some of these&nbsp; fail to identify fakes. Not to mention the amount of money they charge. Foundations and committees usually charge less money for their service. If your plan is to sell this painting it would be worth the time and money. Nice painting by the way.[/QUOTE]</p><p><br /></p>

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