Ray_Omega correctly observed,
But the page 383 is absent in the "Vindication", Vol. 3
In fact NOT ONE of DaJudge's rainbow library had even 380 pages of text - usually somewhat less.
I don't have a hardcopy of the book to compare, but I suspect that this line may have been included in some (self)promotional advertising at the rear of the book in question. Unfortunately, Research Applications International has not seen fit to include scans of those advertising pages in their pdf versions of the various books. What a shame!