Well, I think I have finally understood what was required--thanks to this thread
https://www.mobileread.com/forums/sh...4&postcount=17 (much obliged,
Doitsu)
As the page containing all the rear-notes was already identified as such through semantics, I have Converted each
Code:
<p id="..." class="footnote"><a href="...">#</a>...</p>
into
Code:
<aside id="..." epub:type="footnote"><p class="footnote"><a href="...">#</a>...</p></aside>
Now, a footnote and nothing else, seems to be gathered into each pop-up, and no footnote gets clipped--which was another issue with some.(??)
Is there some cheat-sheet, or other
usable reference containing such tips? W3C, Daisy, etc., seem directed chiefly to implementers of 'user agents'--tips for 'plain users' aren't so apparent...