Hi there,
Could you please post your message on the County Waterford profile page here: http://www.irelandxo.com/group/county-waterford
You could try looking for additonal information the newspapers or official city archives. The subway incident might be mentioned and there might be more information for you in them.
Do you have any idea what part of Waterford or Cork they are connected to? These are big counties and if I had some idea where they originated, I would then be able to guide you in the right direction.
In the meantime, you could try checking the land records called the Tithe Applotment Books (1823-38) or the later Griffith's Valuation (1848-64). Griffith's is freely available here: www.failteromhat.com This website also has lots of additional information, and actually has some more information specific to Cork. Griffith's can also be found here: www.askaboutireland.com
Please make sure you link anyone else in your family who is interested in their Irish heritage to our site - and indeed anyone else you know of Irish heritage.
Kind regards,
Sinead Cooney
Genealogist (Ireland XO)