The battle took place very early in the reign of the King of Strathclyde, Rhydderch Hael, (patron of St. Kentigern, and Myrddin's supposed brother-in-law), between the Warlord Gwenddoleu ap Ceidio and his cousins Peredur and Gwrgi, Princes of either Ebrauc (modern York), or possibly from Gwynedd.
In this battle Myrddin killed his nephew (by his sister Gwenddydd, wife of King Rhydderch Hael), who was fighting on the opposing side.
This act drove Myrddin mad and he spent the rest of his life roaming the Forests of Celyddon (Glennie 1869).
St Michael and All Angels' Church is situated a mile or so to the south of Longtown, to the west of the A7 and overlooking the River Esk.
(James also employed more direct methods of improving the morals of the area, hanging notable reivers from both sides of the Border and deporting the Grahams of the Esk valley en masse to Ireland.
[6] In October 1592 the Scottish rebel Earl of Bothwell, his wife Margaret Douglas, and the Laird of Burleigh stayed at Netherby with Walter Graham and played cards and football.
[8] The Netherby Estate, owned by the Graham family for 400 years, extends over a large area of the parish along the Scottish border.