All this was somewhat hypothetical and vague; but nothing could be more definite than the reward which he demanded. For it appeared that what this forlorn adventurer required for himself was to be admiral of the Atlantic, ranking with the constable of Castile, Viceroy with power of life and death, in the regions to be occupied, and a large proportion of the intended spoil. And he would accept no less. None divined what he himself knew not, that the thing he offered in return was dominion over half the world. Therefore, when he found that this would not do, Columbus saddled his mule and took the road to France. In that superb moment he showed what man he was, and the action was more convincing than his words had been. An Aragonese official, Santangel, found the money, the L1500 required for the expedition, and the traveller was overtaken by an alguazil a couple of leagues away, and recalled to Granada. Santangel was, by descent, a Jew. Several of his kindred suffered under the Inquisition, before and after, and he fortified himself against the peril of the hour when he financed the first voyage of Columbus. Granada fell on the 2nd of January 1492. The Jews were expelled on the 10th of March. On the 17th of April the contract with Columbus was signed at Santa Fe. The same crusading spirit, the same motive of militant propagandism, appears in each of the three transactions. And the explorer, at this early stage, was generally backed by the clergy. Juan Perez, the hospitable Franciscan, was his friend; and Mendoza, the great cardinal of Toledo, and Deza, afterwards Archbishop of Seville. Talavera, the Archbishop of Granada, found him too fanciful to be trusted. Sailing due west from the Canaries he crossed the Atlantic in its widest part. The navigation was prosperous and uneventful until, changing their course to follow the flight of birds, they missed the continent and came upon the islands. It was the longest voyage that had ever been attempted in the open sea; but the passage itself, and the shoals and currents of the West Indies, were mastered with the aid of nautical instruments from Nuremberg, and of the Ephemerides of Regiomontanus. These were recent achievements of the Renaissance, and without them the undertaking was impossible. Even with the new appliances, Columbus was habitually wrong in his measurements. He put Cuba 18 degrees too far to the west; he thought San Domingo as large as Spain; and he saw mountains 50,000 feet high in Yucatan. Indeed, he protested that his success was not due to science, but to the study of the prophet Isaiah. Above all things, he insisted that Cuba was part of the Asiatic continent, and obliged his companions to testify to the same belief, although there is evidence that he did not share it.