That perfidious enemy sometimes sets a snare for you; tempts you with _a good wind_. Avoid that same _good wind_, turn your back to it if you possibly can. Give that dangerous companion the widest possible berth. Steer very clear of the storm cloud or it will suddenly sink you; ship, crew and cargo. Such is the advice of the brave and skillful Piddington, and, assuredly, one would gladly take such advice. But how? It would be utterly useless if the storm cloud and the ship were brought together within narrow and land locked waters. But, in general, this enormous compound of whirlwind and water spout embraces a circle of ten, twenty, or even thirty leagues, and this gives every ship, on which a constant and intelligent look out is kept, a fair chance of keeping at a respectful distance from so redoubtable a foe. The great point to be ascertained is, _where is the centre_, the nucleus, the terrible home, of this terrible _Typhon_. And then to ascertain its rate of progression and its line of approach. The sailor of the present day has two excellent lights to steer by; his Maury and his Piddington. On the one hand, Maury teaches him the general laws of the air and sea, and the art of selecting and using the currents, directing him, as it were, along the streets and highways of the Ocean. On the other hand, Piddington in his small, but instructive volume, sums up for him, and places in his hands, the _Experience of Tempests_; not only how to avoid them, when possible, but sometimes when to make them useful. And this it is that at once explains and justifies the fine sentence of the Dutch Captain Jansen. "At sea," says he, "the first impression is that of the power of nature, the profundity of the depths--and our own nothingness. On board of the largest ship, we still feel that we are constantly in danger. But when the mind's eye has penetrated the depths and surveyed the expanse, man no longer fears the danger. He rises to the true sense of the situation. Guided by Astronomy, shown by Maury along the highways and byways of the Ocean, he steers his course safely and _confidently_." This is truly sublime. The Tempest is not abolished, it is true; but ignorance, bewilderment, that terrible bewilderment which is born of danger and darkness, are abolished. At least if the seaman of the present day perish, he will know the why and wherefore. Great, oh, very great is the safeguard of having the calm, clear presence of mind, with our soul and intellect unruffled and resigned to whatever may be the effect of the great divine laws of the world which, at the expense of a few shipwrecks, produce Equilibrium and Safety. CHAPTER IV. THE POLAR SEAS.