For twelve years, from 1964 to 1976, O’Brien teaches at St. Finbarr’s Seminary, Farranferris, where he is also the hurling trainer for the school team. He is “at the helm as Farranferris wins Dr. Harty Cups in 1969, 1971, 1972, 1973 and 1974, adding All-Irelands in 1972 and 1974.”
A twelve-year stint as chaplain at the Naval Base of Haulbowline follows before O’Brien returns to parish ministry, again in Blackrock. In 1985, he starts a lengthy stay in Carrigaline where he serves as curate, administrator and finally parish priest of Carrigaline, before retiring from active ministry in 2003.
Barry learns Irish from a young age. He attends Ballymartle National School but is unable to attend secondary school due to a lack of facilities in the area. He begins work on the family farm after primary school. In 1903, he moves to Cork to work as a draper‘s apprentice with the firm O’Sullivan and Howard, where he becomes involved in the Gaelic League and the Ancient Order of Hibernians. A successful athlete, he also plays for the Blackrock National Hurling Club and wins four senior county hurling championships between 1910–13.
In 1913, Barry joins the newly formed Irish Volunteers. In 1915, he moves to Kilkenny to take up employment there, where he continues his volunteer activities. Shortly after the 1916 Easter Rising, he is arrested in Kilkenny in a British Government crackdown, and sent to Frongoch internment camp in North Wales. In 1919, he returns to Cork, where he is Commandant of the Irish Republican Police (IRP) in Cork during the Irish War of Independence. In the Cork No. 1 Brigade of the Irish Republican Army (IRA), he helps with prisoner escapes and returning looted goods after the burning of Cork by Black and Tans. After the Anglo-Irish Treaty and the split that follows, he chooses the anti-Treaty branch of the IRA. He is captured by Irish Free State troops and is sent to Newbridge internment camp on October 6, 1922. He is not charged or convicted of any crime.
Irish Republican prisoners in Mountjoy Prison begin the 1923 Irish hunger strikes, protesting being interned without charges or trial and poor prison conditions. The strike quickly spreads to other camps and prisons, and Barry takes part starting on October 16. He dies 35 days later on November 20, 1923, at the hospital at Curragh Camp. IRA Volunteers Joseph Whitty from Newbawn, County Wexford, dies on September 2, 1923 and Andy O’Sullivan from Denbawn, County Cavan, dies as a result of hunger on November 22, 1923, in Mountjoy Prison. The 41-day hunger strike is called off the following day, November 23. Whitty, Barry and O’Sullivan are three of the 22 Irish Republicans who die on hunger-strike during the twentieth century. Barry is initially buried by the Free State army in the Curragh, but three days later, following a court order, his remains are disinterred. He is buried in the Republican plot at St. Finbarr’s Cemetery, Cork.
Prior to Barry’s body arriving in County Cork, the Bishop of Cork, Daniel Cohalan, issues a letter to the Catholic churches which forbids them to open their doors to his body. Bishop Cohalan expresses far different opinions on the 1920 death, also by hunger strike, of the Lord Mayor of CorkTerence MacSwiney. “Terence MacSwiney takes his place among the martyrs in the sacred cause of the Freedom of Ireland. We bow in respect before his heroic sacrifice. We pray that God may have mercy on his soul.”
In Barry’s hometown of Riverstick there stands a stone memorial, unveiled in 1966, in his honor and he is remembered with a wreath-laying commemoration every November.