Hi Summerhill,
I think we are related ! My great grandfather was also the same Patrick Campbell. My grandfather was Leo, he also lived in Great James street before moving to Dublin his wife Olive Kitson from Burnsfoot. My father (also Leo) and his brother are still alive & well living in Dublin. I will be moving back to Ireland (near Derry) this year after living abroad for 20 years, so just happened to do a search on GGDad's name as I know there is a plaque dedicated to him in the town hall of Derry which I intend to visit. Maybe I already know you ? (only if your Grandfather is also Leo) ? I can't figure out how to send a PM on this forum..
Thanks for all the info on this site which I will enjoy sharing with the rest of the family.