Edward Grim was a monk from Cambridge who visited Canterbury Cathedral on Tuesday 29 December 1170 when Thomas Becket was murdered. He researched and published a book, Vita S. Thomae (Life of St. Thomas) in about 1180, which is today known chiefly for a short section in which he gave an eyewitness account of the events in the Cathedral. He himself attempted to protect Becket, but had his arm injured during the attack.
- Stephen, Leslie; Lee, Sidney, eds. (1890). . Dictionary of National Biography. 23. London: Smith, Elder & Co.
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- The relevant section from Life of Thomas Becket