Here he received some gold dust, and with this and some thirty negroes he returned to Lisbon, where the strange black negroes "caused the most lively astonishment among the people." The small quantity of gold dust created a sensation among the Portuguese explorers, and the spirit of adventure grew. No longer had the Prince to urge his navigators forth to new lands and new seas; they were ready and willing to go, for the reward was now obvious. The news was soon noised abroad, and Italians, then reckoned among the most skilful seamen of the time, flocked to Portugal, anxious to take service under the Prince. "Love of gain was the magic wand that drew them on and on, into unknown leagues of waters, into wild adventures and desperate affrays." The "Navigator" himself looked beyond these things. He would find a way to India; he would teach the heathen to be Christians. He was always ready to welcome those with superior knowledge of navigation; so in 1454 he sent an Italian, known to history as Cadamosto, to sail the African seas. The young Venetian was but twenty-one, and he tells his story simply. "Now I--Luigi Ca da Mosto--had sailed nearly all the Mediterranean coasts, but, being caught by a storm off Cape St. Vincent, had to take refuge in the Prince's town, and was there told of the glorious and boundless conquests of the Prince, the which did exceedingly stir my soul--eager it was for gain above all things else. My age, my vigour, my skill are equal to any toil; above all, my passionate desire to see the world and explore the unknown set me all on fire with eagerness." In 1455 Cadamosto sailed from Portugal for Madeira, now "thickly peopled with Portuguese." From Madeira to the Canaries, from the Canaries to Cape Blanco, "natives black as moles were dressed in white flowing robes with turbans wound round their heads." Here was a great market of Arab traders from the interior, here were camels laden with brass, silver, and gold, as well as slaves innumerable. But Cadamosto pushed on for some four hundred miles by the low, sandy shore to the Senegal River. The Portuguese had already sailed by this part of the coast, and the negroes had thought their ships to be great birds from afar cleaving the air with their white wings. When the crews furled their sails and drew into shore the natives changed their minds and thought they were fishes, and all stood on the shore gazing stupidly at this new wonder. Cadamosto landed and pushed some two hundred and fifty miles up the Senegal River, where he set up a market, exchanging cotton and cloth for gold, while "the negroes came stupidly crowding round me, wondering at our white colour, which they tried to wash off, our dress, our garments of black silk and robes of blue cloth." Joined by two other ships from Portugal, the Italian explorer now sailed on to Cape Verde, so called from its green grass.