Thanks to everyone who has helped so far. I have spoken to my friend again (John O'Connell is her husband) and they would like to find Kathleen's grave and story. Sorry but there is so little extra material. John thinks his father, Patrick, was born in 1905 - later than Kathleen. There were only two other siblings, Jack and Kathleen. And he remembers they lived in Charleville.
Sorry this is so sketchy. I'm not holding out a great deal of hope. I do think that train accident death looks like a 'possible' and am sending it over to them. They are also going to order that death certificate for the 15 year old. Will keep you posted.