St Johnston
She retired to Kilmacrennan. In 1608, with all her sons dead, she implicated her son-in-law, Niall Garve, in plotting against King James I and saw him sent to the Tower of London, where he later died. Her date of death is unknown. In her later years, she also maintained Mongavlin Castle, a small fortress on the banks of the River Foyle, as a residence just south of St Johnston, The Laggan, East Donegal.