Lord Francis Douglas Marquess of Queensberry; a younger brother, Lord Archibald Edward Douglas (1850–1938), who became a clergyman; and a younger brother and sister, the twins Lord James Douglas (d. 1891) and Lady Florence Douglas (1855–1905), who married Sir Alexander Beaumont Churchill Dixie, 11th Baronet. He was an uncle of Oscar Wilde's lover Lord Alfred Douglas, and a younger brother of John Douglas, 9th Marquess of Queensberry. In 1858, Douglas's father, Lord Queensberry, died in what was reported as a shooting accident, but his death was widely believed to have been suicide. In 1862, his mother, Lady Queensberry, converted to Roman Catholicism and
Lord Alfred Douglas a contributing editor. "Plain English" ran until the end of 1922. Douglas would later admit that its policy was "strongly anti-Semitic". From August 1920 (issue No 8) "Plain English" began publishing a long running series of articles called "The Jewish Peril" by Major-General Count Cherep-Spiridovitch the title of which was taken from the fore-title of George Shanks's version of "The Protocols of the Elders of Zion". "Plain English" advertised (from issue 20) The Britons' second edition of Shank's version the Protocols. Douglas challenged the "Jewish Guardian", published by the League of British Jews, to take him to court suggesting they