The National Library of Wales has a load of digitised old journals (although unfortunately not the one I was looking for), of particular caving interest seems to be the Journal of the Gower Society:
http://welshjournals.llgc.org.uk/browse/search/1/cave/t_tei?
Mike
http://welshjournals.llgc.org.uk/browse/search/1/cave/t_tei?
Mike