The Right Honourable Sir Colville Adrian de Rune Barclay, 1869-1929, was the younger son of Sir Colville Barclay, 11th Baronet. He entered the diplomatic service as an Attachin 1894 and subsequently became 3rd Secretary in 1896, 2nd Secretary in 1900 and 1st Secretary in 1907. He was Councillor of Embassy in Washington, 1913; Minister Plenipotentiary in Washington, 1918; and Envoy Extraordinary and Minister Plenipotentiary to Sweden, 1919-1924, and to Hungary, 1924-1928. His last posting was to Portugal as HM Ambassador Extraordinary and Plenipotentiary from 1928. He was awarded an MVO in 1903, a CBE in 1917, a CB in 1917, KCMG in 1922. He was sworn of the Privy Council in 1928.
From the guide to the BARCLAY, Sir Colville Adrian de Rune, 1869-1929, Diplomat, c1848-1928, (British Library of Political and Economic Science)
