Visible notes
ED Yencken's younger brother, Arthur Yencken was a British diplomat who died in mysterious circumstances:
An allegation that an Australian, Mr. Arthur Yencken, wartime acting British Minister in Spain, was murdered in 1944, is made in a parliamentary question to be submitted to the House of Commons on Wednesday.
Mercury (Hobart, Tas. : 1860 - 1954), Monday 26 January 1953, page 3