2.1.23 to 2.1.24

The admiral departed La Isabela for Spain on March 10, 1496, leaving his brothers, Bartholomew and Diego, in charge of the settlement. He reached Cádiz on June 11 and immediately pressed his plans for a third voyage upon his sovereigns, who were at Burgos. Spain was then at war with France and needed to buy and keep its alliances; moreover, the yield from the second voyage had fallen well short of the investment. Portugal was still a threat, though the two nations had divided the Atlantic conveniently between themselves in the Treaty of Tordesillas (June 7, 1494). According to the treaty Spain might take all land west of a line drawn from pole to pole 370 leagues—i. e. ,about 1,185 miles (1,910 km)—west of the Cape Verde Islands, whereas Portugal could claim land to the east of the line; but what about the other side of the world, where West met East? Also, there might be a previously undiscovered antipodean continent; who, then, should be trusted to draw the line there? Ferdinand and Isabella therefore made a cautious third investment. Six ships left Sanl�car de Barrameda on May 30, 1498, three filled with explorers and three with provisions for the settlement on Hispaniola. It was clear now that Columbus was expected both to find great prizes and to establish the flag of Spain firmly in the East. Certainly he found prizes, but not quite of the kind his sponsors required. His aim was to explore to the south of the existing discoveries, in the hope of finding both a strait from Cuba (his "Cathay") to India and, perhaps, the unknown antipodean continent. On June 21 the provision ships left Gomera for Hispaniola, while the explorers headed south for the Cape Verde Islands. Columbus began the Atlantic crossing on July 4 from São Tiago Island in Cape Verde. He discovered the principle of compass variation (the variation at any point on the Earth's surface between the direction to magnetic and geographic north), for which he made brilliant allowance on the journey from Margarita Island to Hispaniola on the later leg of this voyage, and he also observed, though misunderstood, the diurnal rotation of the northern polestar (Polaris). After stopping at Trinidad (named for the Holy Trinity, whose protection he had invoked for the voyage), Columbus entered the Gulf of Paria and planted the Spanish flag on the Paria Peninsula in Venezuela. He sent the caravel El Corréo southward to investigate the mouth of the Grande River (a northern branch of the Orinoco River delta), and by August 15 he knew by the great torrents of fresh water flowing into the Gulf of Paria that he had discovered another continent—"another world." But he did not find the strait to India, nor did he find King Solomon's gold mines, which his reading had led him and his sovereigns to expect in these latitudes; and he made only disastrous discoveries when he returned to Hispaniola.