Here comes the Leaky Pipe Story full-circle…
I have the Chan Thomas original 1963 first edition complete with inserts in good condition. Bought It a helluva lot cheaper 4 years ago than the current eBay ads.
I think y0u're thinking about the photocopied docs after the book in that spook version. See pic attached. The measurement is blocked out in the spook pdf copy. The book goes to page 55 and has a separate author's reading list inserted in it. The back cover is pretty badass though so I'm posting it also.