They steered at first for the Canaries, over a well-known course; but on the 6th of September they sailed from Gomera, the most distant of those islands, and, leaving the usual track of navigation, stretched westward into the unknown sea. And still ever westward for six-and-thirty days they bent their course through the dreary desert of waters; terrified by the changeless wind that wafted them hour after hour further into the awful solitude, and seemed to forbid the prospect of return; bewildered by the altered hours of day and night, and more than all by the mysterious variation of their only guide, for the magnetic needle no longer pointed to the pole.[44] Then strange appearances in the sea aroused new fears: vast quantities of weeds covered the surface, retarding the motion of the vessels; the sailors imagined that they had reached the utmost boundary of the navigable ocean, and that they were rushing blindly into the rocks and quicksands of some submerged continent. The master mind turned all these strange novelties into omens of success. The changeless wind was the favoring breath of the Omnipotent; the day lengthened as they followed the sun's course; an ingenious fiction explained the inconstancy of the needle; the vast fields of sea-weed bespoke a neighboring shore; and the flight of unknown birds[45] was hailed with happy promise. But as time passed on, and brought no fulfillment of their hopes, the spirits of the timid began to fail; the flattering appearances of land had repeatedly deceived them; they were now very far beyond the limit of any former voyage. From the timid and ignorant these doubts spread upward, and by degrees the contagion extended from ship to ship: secret murmurs rose to conspiracies, complaints, and mutiny. They affirmed that they had already performed their duty in so long pursuing an unknown and hopeless course, and that they would no more follow a desperate adventurer to destruction. Some even proposed to cast their leader into the sea. The menaces and persuasions that had so often enabled Columbus to overcome the turbulence and fears of his followers now ceased to be of any avail. He gave way to an irresistible necessity, and promised that he would return to Spain, if unsuccessful in their search for three days more. To this brief delay the mutineers consented. The signs of land now brought almost certainty to the mind of the great leader. The sounding-line brought up such soil as is only found near the shore: birds were seen of a kind supposed never to venture on a long flight. A piece of newly-cut cane floated past, and a branch of a tree bearing fresh berries was taken up by the sailors. The clouds around the setting sun wore a new aspect, and the breeze became warm and variable. On the evening of the 11th of October every sail was furled, and strict watch kept, lest the ships might drift ashore during the night.