One probably shouldn't complain about free content, but since the author has shown an interest in discussing the format, and also as a general observation on posting sincerely informative articles such as the one in question:

I agree with Jack that the article would be much more readable and popular as a single web page, preferably with a list of sections at the top of the page, the section names being links to the top of each section (similar to the links to posts at the top of each Mudcat page).

13,000 words on a web page wouldn't be unwieldy in the least with today's hardware and browsers, and in addition to not having the annoyance and distraction of having to change pages repeatedly there would be the considerable advantage of being able to use the scroll wheel, scroll bar, arrow keys, PgUp/PgDown, and especially Ctrl-F search, on the whole article at once.

The side boxes are almost as much of a nuisance as breaking the article up into meaningless numbered pages. They're another tactic better left to commercial enterprises whose primary purpose is to bewilder the reader and make him/her more vulnerable to advertising pressure.