In 1937 Harris began taking lessons in projective synthetic geometry, based upon the ideas of Goethe as reflected in the teachings of Steiner, from Olive Whicher and George Adams.

John Symonds writes: [Crowley] helped her through the portals of the mystical Order of the A∴A∴ (Argenteum Astrum) She took the name of Tzaba "Hosts", which adds up to 93, the number of the Thelemic current which she was trying to tap.

[3] According to Crowley's unpublished Society of Hidden Masters,[4] on 11 May 1938, Lady Harris became his "disciple" and also became a member of Ordo Templi Orientis, entering directly to the IV° (Fourth Degree) of that Order due to her previous initiation into Co-Masonry.

[citation needed] The author William Holt in his autobiography describes how he accompanied Harris to Crowley's lodgings at 93 Jermyn Street, Piccadilly.

[citation needed] By Crowley's own admission, the deck was originally intended to be traditional but Harris encouraged him to commit his occult, magical, spiritual and scientific views to the project.

With incredible rapidity she picked up the rhythm, and with inexhaustible patience submitted to the correction of the fanatical slave-driver that she had invoked, often painting the same card as many as eight times until it measured up to his Vanadium Steel yardstick!

On 29 May 1942 Crowley wrote to Pearson, the photoengraver of the Thoth deck: I should like to emphasise that I am absolutely devoted to Lady Harris, and have the evidence of countless acts of kindness on her part, indicating that her feelings toward me are similar.

She bequeathed the original paintings of her Tarot cards to fellow Thelemite Gerald Yorke, who in turned placed them with the Warburg Institute along with much other Crowley material that he had collected over the years.

[7] Her legacy can be found in a later reprinting of The Book of Thoth: May the passionate "love under will" which she has stored in this Treasury of Truth and Beauty flow forth from the Splendour and Strength of her work to enlighten the world; may this Tarot serve as a chart for the bold seamen of the New Aeon, to guide them across the Great Sea of Understanding to the City of the Pyramids!