I assume you figured out Yvain meant this, but you may not have seen my warning: watch out for the quotation marks. Don’t let Crowley lull you into ignoring them.
Also, the site I linked has the vast majority of Crowley’s writings for free (in html form).
Sadly the link to Crowley’s work is no longer valid. I’ve also tried the wayback machine—which also does not have a record of the link.
Crowley wrote a lot, so I’m unsure where to even begin looking for the particular essay you refer to here. Can you give me a clue where I might start?
I assume you figured out Yvain meant this, but you may not have seen my warning: watch out for the quotation marks. Don’t let Crowley lull you into ignoring them.
Also, the site I linked has the vast majority of Crowley’s writings for free (in html form).
In the OP’s post, they mention that they previously produced a number of quotes from said essay.
That link points to http://lesswrong.com/lw/57/the_sacred_mundane/3jj#comments where Yvain does extensively quote Crowley.
That done, it is trivial to run a Google search on substrings, like: http://www.google.com/search?q=%22In+the+course+of+our+concentration+we+noticed+that+the+contents%22
Google instantly turns up at least 3 citations to Crowley’s Magick: Book 4.
Thank you :)