2 Important Crowley Invocations in History

[Tinman]

In the Temple of Solomon the King, Crowley's diary entry for April 20th, 1906 is:

20. A\ in the presence of my Soror F.
    (The results of this and the next invocation were most brilliant and important. They revealed the Brother of A\ A\ who communicated in Egypt as the Controller of all this work. Their importance belongs therefore rather to the history of those relations than of this simple invocation-method, and will be dealt with in another place. P. was entirely sceptical of these results at the time.)

April 21. A\ with Soror F. Left Shanghai.

,, 22. Ill. No regular A\ but much concentrated thought. Decided to reject results of 20th and 21st, and go on as if they had never happened.

1. Where would I find further information on those 2 invocations?
2. Who is Soror F?

Thanks

[Tinman]

I answer my own question after further digging: but if anyone has further insight, that would be helpful too:

1. Confessions, ch 58
2. Elaine Simpson