Qabalah and the Law of One.

[Nau7ik]

The Middle Pillar was actually a creation of Israel Regardie more or less, and he was never in any original GD temple, he was only part of the off-shoot Stella Matutina. Most of his original magical training was actually just what Crowley taught him when he was his secretary.

I think you're right. Crowley did correspondence for the chakras and the Tree of Life, but he used the Indian system. (Of which I don't know much about at all.) I think this information is in one of the Crowley's Equinox publications. That seems to be what Regardie did as well.

Anyway I just thought it was an interesting drawing. There's definitely a mixing of systems here.