On the 14th of September the sailors saw a swallow and some tropic-birds. The sight of these birds was an evidence of land being near, for they do not usually fly more than about seventy miles out to sea. The temperature was very mild, the weather magnificent; the wind blew from the east and wafted the caravels in the desired direction. But it was exactly this continuance of east wind which frightened the greater part of the sailors, who saw in this persistence, so favourable for the outward voyage, the promise of a formidable obstacle to their return home. On the 16th of September some tufts of seaweed, still fresh, were seen floating on the waves. But no land was to be seen, and this seaweed might possibly indicate the presence of submarine rocks, and not of the shores of a continent. On the 17th, thirty-five days after the departure of the expedition, floating weeds were frequently seen, and upon one mass of weed was found a live cray-fish, a sure sign this of the proximity of land. During the following days a large number of birds, such as gannets, sea-swallows, and tropic-birds, flew around the caravels. Columbus turned their presence to account as a means of reassuring his companions, who were beginning to be terribly frightened at not meeting with land after six weeks of sailing. His own confidence never abated, but putting firm trust in God, he often addressed energetic words of comfort to those around him, and made them each evening chant the _Salve Regina_, or some other hymn to the Virgin. At the words of this heroic man, so noble, so sure of himself, so superior to all human weaknesses, the courage of the sailors revived, and they again went onwards. We can well imagine how anxiously both officers and men scanned the western horizon towards which they were steering. Each one had a pecuniary motive for wishing to be the first to descry the New Continent, King Ferdinand having promised a reward of 10,000 maravedis, or 400 pounds sterling, to the first discoverer. The latter days of the month of September were enlivened by the presence of numerous large birds, petrels, man-of-war birds, and damiers, flying in couples, a sign that they were not far away from home. So Columbus retained his unshaken conviction that land could not be far off.