Page "Francisco de Ulloa" Paragraph 6

Although his discoveries lent support to the fact that Baja California was a peninsula, his reports were used to create maps depicting California as an island.

According to Díaz del Castillo, Ulloa was stabbed to death by a sailor after his return in 1540.

By other accounts, his ship was lost without a trace during the return voyage from Baja California.

Supposedly his ship was swept inland with a tsunami, later becoming known as the Lost Ship of the Desert.