This victory allowed Prince John to use the Canary Islands as an "exchange coin" in the peace treaty of Alcáçovas. ↑ ↓ Pina, Chronica de El-Rei D. Affonso V​, 3rd book, chapter CXCIV (Editorial error: Chapter CXCIV erroneously appears as Chapter CLXIV.Reports the end of the siege of Ceuta by the arrival of the fleet with Afonso V). ↑ ↓ Quesada, Portugueses en la frontera de Granada​, 2000, p.