My own astonishment, however, was but momentary. Hastily scanning the horizon, I had noticed that the mist in the direction of the island had been, during the fifteen minutes that I had been idly looking over the ship’s side, slowly creeping up towards us, although in every other direction, except down in the extreme distance, the sky was as clear as before. At first moreover my imagination had yielded to the impression that, as the strain died away on the night, it came out again from a different quarter of the horizon; but when, divesting myself of the momentary influence of my fancy, I began to analyze the causes of this phenomenon I became satisfied that the sounds in reality arose out of the bank of clouds, to windward, and the illusion had been produced by the rising and falling of the strain upon the night. When therefore, the old boatswain turned to me with his baffled look, I had made up my mind as to the real causes of that which puzzled the veteran seaman. “There is a craft up yonder in that fog,” I said, pointing to windward, “and there are women on board, for the voices we hear are too sweet for those of men.” I said this with a calm smile, which at once dissipated the fear of my companion, for after thinking a moment in silence, the puzzled expression of his face gradually cleared away, and he replied with a low laugh, which I thought, notwithstanding, a little forced. “You are right—and that’s a reason for book-larnin I never thought of before. Here have I sailed for a matter of forty years or so, and yet I couldn’t exactly come at the cause of them same sounds, when you, who havn’t been ten years on the water,—though you’re a smart sailor, I must say, for your years—can tell at once all about it, just because you’ve had a riggilar eddication. Book-larnin ain’t to be despised arter all,” he continued shaking his head, “even for a boatswain, and, by the blessing of God, I’ll borrow the good book of the parson, to-morrow, and go at it myself; for when I was a youngster I could spell, I calculate, at the rate of a ten knot breeze. But mayhap,” he continued, his thoughts suddenly changing, “that craft up yonder may turn out a fat prize—we could soon overhaul her if the wind would only breeze up a little.”