Diego de Alcaraz was the first Spanish soldier the four survivors led by Álvar Núñez Cabeza de Vaca encountered. He was initially dubious of their claims to be Spaniards, particularly as they'd been burnt by their years-long trek in the desert. However, he soon came to believe their claims, and escorted them to Culiacán. As Alcaraz did not provide the slave Estevánico with a horse, Estevánico saw no reason to reveal the existence of his magical eyewear. His fellow survivors tacitly agreed.