 Trying to get around the Gulf Coast, they built five barges, but in November 1528 these went aground off the coast of Texas.Estevanico, Dorantes, and Alonso Castillo Maldonado, the only survivors, spent several months living on a barrier island (now believed to be Galveston Island) before making their way in April 1529 to the mainland.American Indians captured and enslaved the party, putting them to work as laborers.