Dell edition, pages 1-35; Pocket Books edition, pages 1-29; about the first 10 percent of an ebook such as a Kindle.
My notes will refer to the page number in the Dell edition.
Dedication: "To Graham, Jyoti and Karuna." Graham might be the name of Wilson's son, but the other surviving children when the book was published were Christina and Alexandra. (Patricia, known as Luna, had died, as described in Cosmic Trigger.) Can anyone help me out? UPDATE: In the comments, Rarebit explains that Karuna and Jyoti are Christina and Alexandra.
Note: The Great God Pan is by Arthur Machen. The King in Yellow is by Robert W. Chambers. The two titles may be downloaded for free from Project Gutenberg (and other sources, such as Amazon).
"no wife no horse no mustache" page 4. Phrase that recurs in many of RAW's works. As Joe Malik explains in Schroedinger's Cat, he ran across an article of the same title in Reader's Digest and then refused to read it, reasoning that no real article could be as interesting as the mysterious and evocative title. As I documented, there apparently really was such an article.
"Sir John Babcock" page 5: A descendant, one assumes, of the Babcocks featured in the "Historical Illuminatus" books.
"what manner of man is he" page 5. There are images of Aleister Crowley wearing a turban. Crowley wrote Clouds Without Water, the "accursed" book that bothers Babcock.
"he was wearing a turban and seemed some loathesomely obese Demon-Sultan" page 5. Image of Aleister Crowley.
"the Russian," page 7. Lenin.
The Black Brotherhood, perhaps not the usage intended, but the name of a group that opposed the persecution of the Cathars. About the Cathars, see Robert Shea's novel, All Things Are Lights.
"Stately, plump Albert Einstein", page 12. This passage echoes the beginning of James Joyce's Ulysses.
"Nur der wahnsinnige ist sich absolut sicher" page 20. Only the madman is absolutely sure.
"The figure that staggered into the shadow-dark Rathskeller ... " page 21. Echoes H.P. Lovecraft as Wilson earlier echoed James Joyce. Notice for example the use of the word "eldritch."
"The boy's mother was Lady Catherine (Greystoke) Babcock" and subsequent sentences, Page 27. This sounds like a nod to Philip Jose Farmer's Wold Newton family, which ties various characters in fiction (such as the Greystokes, e.g. Tarzan's family) into one family. Farmer and Wilson were fans of each other's work.
Suggest supplemental reading: "Joyce's Influence on Masks of the Illuminati," essay in Eric Wagner's An Insider's Guide to Robert Anton Wilson.