Complex sentence: Saint Tigernan is said to have appeared to McWattin every night until he promised to make amends; he gave the abbey an "éraic" of a quarter of land ("ceathrú mír", about 120 acres) at Ballinbraher (Friarstown).
Split into simpler sentences: Saint Tigernan is said to have appeared to McWattin every night until he promised to make amends; he gave the abbey an. This he did by giving the abbey an "éraic" of a quarter of land ("ceathrú mír", about 120 acres) at Ballinbraher (Friarstown).