In the Hull Daily Mail 16 May 1934, an article on the retirement of HBM says
"His personal art productions have been mainly in the realms of portraiture, one of the most successful being a portrait in oils of the late Duke of Beaufort."
Western Daily Press 11 Dec 1907 there is a report on the AGM of the Bristol Conservative Working Men's Association
"They thanked their President, his Grace the Duke of Beaufort, for the assistance he had given them from time to time, and at their annual dinner. The Association having asked his Grace to sit for his portrait, he kindly consented to do so. His time however did not permit of more than a few hours being obtained and after waiting many months for a promised sitting, to get certain alterations, the artist Mr H Burman-Morrall, was obliged to leave for an appointment in Sheffield, where he did his best to finish it, and it was now placed finally before the Association for acceptance to hang in the headquarters of the Association."