Calm amid the ever-increasing excitement, Columbus, with greater ingenuity than penetration, explained away the strange deviation――the cause of which has not yet been determined, though many great authorities attribute it to solar influence――by saying that it was due, not to any fault in the compass itself, but to the alteration of the position of the north star. Thus, whether he himself did or did not believe this to be the true solution of the mystery, did our hero once more calm the terrors of his men, who were, a little later, further cheered by the sight of a heron and a water-wagtail, which, as birds supposed never to venture far out to sea, were looked upon as sure harbingers of land. Next were seen floating patches of herbs and weeds, which could only, it was thought, have been washed from river banks, or from rocks by the sea-shore; and, convinced that their perils were now over, the eager mariners crowded on deck, each anxious to be the first to catch a glimpse of the longed-for country; but as day after day passed on, and no further indications of the end of the voyage were perceived, all the old fears returned, the men broke out into open mutiny, and Columbus’s position became critical in the extreme. Even Martin Alonzo Pinzon, one of the most important members of the squadron, now questioned the wisdom of the Admiral’s determined adherence to a western course; and our hero, though still full of the most intense belief in final success if that course were maintained, was beginning to doubt whether he should himself achieve more than martyrdom in the cause he had so much at heart. Matters were at this stage, when, on the night of the 11th October, 1492, as the weary leader was peering into the darkness of the horizon from the deck of his vessel, hoping against hope to make out some indication of land, no matter how vague, he fancied he saw a light. Scarcely daring to trust his eyes, he called first one and then another of the companions of his venture, each of whom confirmed his opinion. A light of some kind was undoubtedly moving on the distant waters, but whether it proceeded from some fisherman’s bark, or from the long-sought land, it was impossible to determine.