William Wynn Westcott (1848-1925) was an English Freemason, Supreme Magus of the Societas Rosicruciana in Anglia and co-founder the Golden Dawn. His original 1890 work on numbers was recognized as a significant treatise and of value to all students of numerology. Westcott expanded and revised the work in 1902 and 1911. This is the 1911 edition of this work reformatted and typeset in modern type.
William Wynn Westcott—who usually published as W. Wynn Westcott or W.W. Westcott and occasionally under the motto Sapere Aude—was a coroner, Theosophist, and Freemason who was a leader in the Societas Rosicruciana in Anglia and went on to co-found the Hermetic Order of the Golden Dawn, later remaining involved with the breakaway group Stella Matutina.