[4] In Castile, Teles was tasked in May 1464 with the mission of recruiting three hundred knights for Peter, Constable of Portugal, disputed King of Aragon.
The following July, in the midst of the dismay caused by the loss of Lleida,[5] he informed Peter that he would arrive in Tortosa, at the head of an army of five hundred Portuguese and Castilian troops.
[6] The situation worsened on 8 March 1466 when the king, against the will of the Generalitat de Catalunya, appointed Teles captain general of the Catalan province of Empordà and gave him the Bishopric of Girona, replacing his brother João da Silva, who had travelled to England on a diplomatic mission.
His position became so untenable that the following June the deputies, taking advantage of the king's illness, devised a plan to imprison him.
[7] Teles died after being struck on the head by a stone while trying to resolve a street fight in Alcácer do Sal on 1 April 1477.