In-reply-to > And there it is: Another rotation of this feed.

I see your feed has a prev on the header, but older feeds do not have a next. If browsing to older feeds is to be possible, how does one handles the browsing from the oldest, to the next, to the next, and so on? If I am browsing twtxt-old_2021-12-23_f6y65bq.txt, how do I know which is the next newer (but not the newest)?