Bingo! I misunderstood part of WHRoeder's reply but reading it side by side
with Charles' it's all beginning to make some sense to me. My most sincere
thanks to you both for your time and patience. The rules I applied were:

+*=384721*
-*/*calendar*
-*/*faq*
-*/*external*
-*/*forumdisplay*
-*/*index*
-*/*itrader*
-*/*login*
-*/*payments*
-*/*sendmessage*
-*/*showgroups*
-*/*archive*/*
-*/*yahoo*/*
-*/*facebook*/*
-*/*partner*/*
-*/*google*/*
-*/*client*/*
-*/*showpost*

With the small thread I'm testing I'm now able to capture the thread in it's
entirety, with the images and the page structure preserved. The filters I used
blocked all the other threads and unwanted parts. The only remaining curiosity
I have is this.

The mirror directory containing the html files for the 3 thread pages contains
8 html files. 3 of them are page 1, 4 of them are page 2 and 1 is page 3. The
duplicates appear identical in my browser and don't appear to be, for example,
"print versions". Given their relatively small file size I'm not really all
that concerned but I'm a curious critter by nature. Is there something else I
can do to enable only one html file for each page?
Cheers, Jp.