:::All I can suggest is, get writing. You both have knowledge and passion for the area, so you would be the perfect people to expand this page. You state that other areas are better documented, but don't believe it, no one cared about the Rhondda page, and it took me from July last year to March to drag the article from a 1000 byte stub to Good article status, including adding almost all the photos and spending much time in local libraries. Be brave and start editing, otherwise you or someone else will be having the same discussions about why no one is expanding this article next year. Good luck.