Upon leaving these islands and heading straight to the west, with a slight deviation to the south-west, Columbus sailed thirty-three successive days without seeing anything but sea and sky. His companions began to murmur in secret, for at first they concealed their discontent, but soon, openly, desiring to get rid of their leader, whom they even planned to throw into the sea. They considered that they had been deceived by this Genoese, who was leading them to some place from whence they could never return. After the thirtieth day they angrily demanded that he should turn back and go no farther; Columbus, by using gentle words, holding out promises and flattering their hopes, sought to gain time, and he succeeded in calming their fears; finally also reminding them that if they refused him their obedience or attempted violence against him, they would be accused of treason by their sovereigns. To their great joy, the much-desired land was finally discovered.[5] During this first voyage Columbus visited six islands, two of which were of extraordinary magnitude; one of these he named Hispaniola, and the other Juana,[6] though he was not positive that the latter was an island. While sailing along the coasts of these islands, in the month of November, the Spaniards heard nightingales singing in the dense forests, and they discovered great rivers of fresh water, and natural harbours sufficient for the largest fleets. Columbus reconnoitred the coast of Juana in a straight line towards the north-west for no less than eight hundred thousand paces or eighty leagues, which led him to believe that it was a continent, since as far as the eye could reach, no signs of any limits to the island were perceptible. He decided to return,[7] also because of the tumultuous sea, for the coast of Juana towards the north is very broken, and at that winter season, the north winds were dangerous to his ships. Laying his course eastwards, he held towards an island which he believed to be the island of Ophir; examination of the maps, however, shows that it was the Antilles and neighbouring islands. He named this island Hispaniola. Having decided to land, Columbus put in towards shore, when the largest of his ships struck a concealed rock and was wrecked. Fortunately the reef stood high in the water, which saved the crew from drowning; the other two boats quickly approached, and all the sailors were taken safely on board.