I will start with Cork first, maybe I won't get any further than that! It's a big county!
The aim is to put as many of the old Irish maritime photos from the various collections in one place. The library pages are terribly cumbersome to navigate. Maybe they should run their own tumblrs?! I'll also filter out the photos from these collections that don't have a maritime theme. I will endeavour to link to each collection, with each photo I post. These are all in the public domain and the ultimate copyright rests with the library collections. If they don't have a link they are either scanned or reblogged. And please submit if you have any original photos you want to scan and share!
Sources: www.corkcoco.ie, http://catalogue.nli.ie/