Archbishop Gauthier laid the cornerstone on May 8, 1904, and blessed the completed church on November 20, 1904 when the first mass was held. The Stations of the Cross were erected that evening; the church bell,  christened Hugo Bernard, was installed the next morning.
Father Murtagh died in February 1920, and was buried in the parish cemetery close by the church he had built. In his 26 years in Marmora he had become a living legend.

Tom Murtagh, grand nephew of Father Murtagh writes from Dublin, Ireland:
The 28th of February 2020 is the 100 year anniversary of the death of my  grand uncle,  Fr. Thomas Murtagh,  who I understand was the Parish Priest credited with arranging the building of this lovely Marmora church in 1904. He is buried in the nearby graveyard. If you happen to visit the church can I ask you to say a prayer for him and all the other priests and parishioners whose work made the Marmora community a kinder gentler place over the years.