i know we have a few here who have read Crowley, here is a little tid bit from the Thelema Encyclopedia.
Theosophy and Aleister Crowley
Crowley considered it noteworthy that he was born in the same year as the founding of the Theosophical Society (1875). He was an admirer of the work of Anna Kingsford, who was briefly the head of the British section of the Theosophical Society, and whose Way to Christ was very influential on Samuel Mathers and other early members of The Golden Dawn. He later recognized Blavatsky as a Magister Templi in his A.'.A.'. grade system, and annotated an edition of her Voice of the Silence as Liber LXXI (http://hermetic.com/crowley/libers/lib71.html).
During Annie Besant's headship of the Theosophical Society, Crowley engaged in a long campaign to discredit the Society's leadership, and to insert himself at the head of the movement that they were building to recognize Krishnamurti as the "World Teacher." He also met with Katherine Tingley, who led a schismatic Theosophical group in California.