looking for xml files...

I am working on a mobile app linked to an Atahualpa site that i do not manage (but have the support of the admin and owner of course. (take a look at www dot jewelsofelul dot com). The site has a whole series of post categories (a new set of posts each year, for example).

The site has a couple of limited feeds that are disclosed in the source - but they are not what i am looking for - I am looking for all of the postings in each of the "years."

I am guessing that the theme maintains separate XMLs for each series of posts. Is that correct?

If so, is there a default directory name or path to look for to find those xml files?

Thanks much