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Margaret Haig Thomas, (1883–1958), feminist and magazine proprietor
1908 Married Henry Mackworth
C.1908 Her father wanted someone he could trust absolutely to assist him in the running of his business empire, a cross between "a highly confidential secretary and a right hand man". At her mother's suggestion, he recruited Margaret for the role.
Worked in her father's office in the Cambrian Buildings on Cardiff docks. She attended conferences and board meetings, conducted research into special projects, drafted letters and memoranda, and accompanied him on overseas business trips. She acquired a knowledge of finance, of the workings of the coal and newspaper industries, and learned the arts of negotiation and bluffing.
1908-14 Took an increasingly active part in the women's suffrage movement
By 1914 she had been passed the management of her father's newspaper interests
WWI As politics took more of his attention, she gained increased responsibility for the running of all of his businesses. By the end of the war she was a director of more than 20 companies.
1918 Om her father's death, she inherited his property, his commercial interests, and his title. Viscountess Rhondda, as she now was, was the director of thirty-three companies (twenty-eight of them inherited from her father) and chairman or vice-chairman of sixteen of these.