Leo was born in
Westminster, and took the name of his
sun-sign as a pseudonym, is credited with starting the movement towards a more psychologically-oriented
horoscope analysis in astrology, being the first astrologer to argue for a loose interpretation of possible trends of experience rather than the specific prediction of events. His influence has been described as marking a 'turning point' in horoscope delineation, because, as astrological historian James Holden explains: In 1890, Leo invited
George R.S. Mead to found an occult lodge in
Brixton, South London. Towards the end of his life, in 1909, and again in 1911, Leo travelled with his wife Bessie Leo to
India where he studied
Indian astrology. Leo was a non-smoker, teetotaller and
vegetarian. In 1915, Leo founded the Astrological Lodge of London. ==Legal controversies and death==