Tara,
Thank you so much. That must be him. I dont at this stage know the name of Richard McGuirk's father I am waiting for info from Louise who has just contacted me. I had guestimated that Sarah McGuirk was born about 1815 and I know now had my great grandfather Edward their only child born in Dublin in Booterstown in 1851. She could also have been the mother of Peter 1831. Louise tells me they were from Glendalough. I guestimated that Richard was born about 1802. From Deansgrange cemetry info Sarah died in 1870 at 55yrs and Richard died in 1878 at 76 yrs.