" Stripped of his command, and having learned nothing from the experience of his failed mutiny, Cartagena grew intensely resentful of his inexperienced replacement. From that moment, he burned with desire for revenge against Magellan, no matter what the cost to the expedition, and as Fonseca’s son, Cartagena had power to make great trouble. Of all the perils that Magellan faced on the journey’s first leg, the greatest was Cartagena’s treachery. "

― Laurence Bergreen , Over the Edge of the World: Magellan's Terrifying Circumnavigation of the Globe