 On 11 June 1304 Lamberton and Bruce formed a band "to resist prudently attacks by rivals...to be of one another's council in all their business and affairs at all times...without any deceit" This bond marked Bishop William's switch from supporting Balliol to Bruce.Both Lamberton and Bishop Wishart of Glasgow are said to have assured Bruce that should he make a move for Kingship they would not try to stop him.Bruce murdered the Red Comyn in the Greyfriars Church on 10 February 1306.