16.
Simply he used the old medieval transportation like with horse and boat or ship.
St. Patrick initially came to Ireland when he was kidnapped by Niall of the Nine Hostages to be brought to Ireland as a slave when he was 16 years old.
He was 16 years old when he first came to Ireland.
There are no records or reliable accounts to suggest that Saint Patrick went to jail in his lifetime. He is known for his missionary work in Ireland and is credited with popularizing Christianity in the region.
He was a slave, minding pigs in Ireland.
He was a 16 year old slave.
He never really retired and continued to work in Ireland even in his old age.
Pirates from Ireland captured him when he was 16 years old.
When he was about 60 years old, St. Patrick travelled to Ireland to spread the Christian word. Green is associated with Saint Patrick's Day because it is the color of spring, Ireland, and the shamrock
St. Patrick felt God told him to escape from slavery, in Ireland, when he was 22 years old.
He was carried to Ireland by Druid pirates as a slave until he was 22 years old.
He was 16 years old when captured by pirates from Roman Britain and taken to Ireland.