While at Lisbon, Columbus married a woman far above him in social position, and went with her to live on a little island of the Madeiras, where her family had business interests. Meanwhile he was turning over in his mind schemes for a future voyage to the countries of the Far East. His native city, Genoa, had grown rich in trading in the silks, spices, and precious stones of the Indies, but the journey overland was dangerous, and a water route was much desired. This need the Portuguese had felt along with the rest of Europe, and for a long time Portuguese sea-captains had been slowly but surely finding their way down the west coast of Africa, in search of a passage around the southern cape. This route would be easier and cheaper than the old one through the Mediterranean and across Asia. But Columbus thought out a more daring course, by which he planned to sail directly west from the Canary Islands, across the Atlantic Ocean, expecting at the end of his voyage to find the far-famed Indies. Columbus was so full of his plan that it became the great thought of his life. A water route which would safely bring the wealth of the East to the doors of Europe would be the greatest discovery of the age. Moreover, his ambition was spurred by the thrilling account of a noted traveller, Marco Polo, who two centuries before had brought back from far-off China wonderful tales of golden palaces, of marvellous rivers crossed by marble bridges, and of countless treasures of gold, silver, and jewels. About 1484 Columbus laid his scheme before King John of Portugal. The king would not promise his assistance, but he borrowed hints from the charts of Columbus, and sent men of his own to learn whether they could reach land by sailing west. Meeting with stormy weather, and fearing the unknown expanse of ocean, the sailors soon put back to port, and brought word that there was no land to be seen. When Columbus heard what the king had done he was very indignant, and at once quitted Portugal for Spain. The future appeared gloomy enough to the poor navigator without a helping friend. With bitter memories he shook off the dust of Lisbon, and, leading by the hand his little son Diego, four or five years old, trudged wearily on his journey. Columbus took Diego to the home of the boy's aunt, who lived not far from Palos, and, leaving him in her care, went in search of the king and queen of Spain, Ferdinand and Isabella.