Thanks. For anyone else who wants to do this, here is an example set of commands that worked for me:
mkdir md-dl; cd md-dl
wget https://discuss.criticalfallibilism.com/raw/464\?page\={1..3}
cat 464* > combined.md
Downloading extra pages is OK; they just end up blank. But I think the pages will end up out of order if there are more than 9 because, in alphabetical order, 10 comes before 2.