She was born Nesta Helen Bevan in the stately home Trent Park. She was the youngest daughter of Robert Cooper Lee Bevan, a close friend of Cardinal Manning. Her mother, Emma Frances Shuttleworth, was Robert Bevan's second wife. Emma was a daughter of Philip Nicholas Shuttleworth, Anglican bishop of Chichester. Nesta was educated at Westfield College (now part of Queen Mary, University of London). On coming of age, she travelled around the world, visiting India, Burma, Singapore, and Japan. In India, on 14 May 1904, Nesta married Captain Arthur Templer Webster, Superintendent of the British Police in India. She wrote a number of controversial books who revived conspiracy theories about the Illuminati.
Nesta Helen Webster, 1876-1960, was an outstanding English scholar who did pioneering work in Secret Society research. Her books are meticulously researched and documented, so her work is cited by many other researchers. Her special areas of expertise include the French Revolution, revolutionary movements throughout Europe in the 19th century, and the history of secret societies. She was raised in "High Church" Protestantism.