Initially I got confused reading you post and misread it as the old short Killaloe/Ballina line that used to run from Limerick via Birdhill to Killaloe. (Lexdisia strikes again). Sorry can't help about Killala. As an aside, there are good photo's of the old Killaloe line in the Lakeside hotel in Killaloe as well as plenty of memorabilia posters (e.g. adverts, excursions, special fares, etc). Part of the old station is now a fashionable bistro and another a family home on the edge of the Shannon.