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7/22/1298, King Edward defeated Sir William Wallace at the battle of Falkirk, Scotland. [Followed by the siege of Carlaverock castle.]
3/28/1300, “Royal letters patent: inspeximus and confirmation of Magna Carta … Witnesses: … Reginald de Grey, …” (S) UKNA.
2/12/1301 at Lincoln, Reginald joined in the barons’ letter to the Pope.
7/20/1304, The fall of Stirling castle in Scotland, the Scottish leaders were imprisoned in various castles in England.