The Right Honourable Baroness Mary Soames, or Lady Soames, who held the titles of LG, DBE, and FRSL, was the youngest of the five children of Sir Winston Churchill, who was the prime minister of the UK in the 1940s and the 1950s. She is renowned for her work with the ‘Red Cross’ at the time of the Second World War. In addition to her activities on behalf of several public associations, Lady Mary gained fame as an author, too. Apart from writing a biography of her mother, she provided various unknown pieces of information about the Churchill family to several acclaimed biographers, which are still considered to be the main sources of information about these eminent people.