Columbus's (1451-1506) fourth voyage began on May 9, 1502. Columbus was no longer in command, because of his age and the loss of all titles and privileges connected with the newly discovered lands. The small fleet of four ships left Cadiz, stopped at Gran Canaria, and reached Martinique in early June. The Spanish monarchs had forbidden Columbus to carry any more slaves and to stop at Hispaniola. He nevertheless attempted to land there but was refused permission. He then sailed westward along the coast of Honduras, Nicaragua, and Costa Rica. The quest for gold in the hinterland of these territories was cut short by clashes with natives. Columbus headed back to Hispaniola in April 1503. He discovered the Cayman Islands, which he named Las Tortugas because of their large population of sea turtles. However, he was forced to abandon one vessel that was too damaged by shipworms. The same parasites forced the ships to stop on the western coast of Jamaica, while two men set out by canoe to seek help in Santo Domingo. Columbus and his men survived with the help of the natives and, eventually, a rescue ship brought them back to Hispaniola on June 28, 1504. On November 7, having paid for the journey himself, Columbus returned to Spain for good.