According to Barbour, Comyn betrayed his agreement with Bruce to King Edward I, and when Bruce arranged a meeting for 10 February 1306 with Comyn in the Chapel of Greyfriars Monastery in Dumfries and accused him of treachery, they came to blows. Bruce stabbed Comyn before the high altar. The Scotichronicon says that on being told that Comyn had survived the attack and was being treated, two of Bruce's supporters, Roger de Kirkpatrick (uttering the words "I mak siccar" ("I make sure")) and John Lindsay, went back into the church and finished Bruce's work. Barbour, however, tells no such story. The Flores Historiarum which was written c. 1307 says Bruce and Comyn disagreed and Bruce drew his sword and struck Comyn over the head. Bruce supporters then ran up and stabbed Comyn with their swords. Bruce asserted his claim to the Scottish crown and began his campaign by force for the independence of Scotland.