Many ducks fly at least ninety miles an hour; that is, twenty-six hundred yards a minute, or forty-four yards a second; if, therefore, a duck starts at your feet with that velocity, and you require a second to cover him, he will be out of range; or if he is flying across, and you dwell one forty-fourth part of a second on your aim, you will miss him. A quail, late in the season, flies as fast as this, and rises with a rapidity equal to his flight. He is often found in coverts, dodges and twists with remarkable skill and judgment, frequently flies off in a direct line behind the thickest bush, and requires the perfection of training to bring down with certainty. These are difficulties that patience alone can overcome; for if shooting were simple, there would be no art or pleasure in it. All books on sporting tell you to fire ahead of cross shots, and in this they are right; but the reason they give is, that time is necessary for the shot to reach the object--in this they are wrong; shot moves infinitely faster than the bird, and for practical purposes, reaches its mark instantaneously. Human nerves and muscles, however, are imperfect, and it requires an instant, an important one, to discharge the gun after the aim is taken. The result, therefore, is the same, and you must endeavor to shoot ahead of the bird; and if he is flying fast, far ahead of him. If the motion of the object is followed and the gun kept moving before the discharge, some writers allege no allowance need be made, but it is so difficult not to pause slightly, that it is better in all cases to allow some inches. To follow the motion of a very fast-flying bird, is almost, if not quite impossible, and the attempt to do so at all, is apt to create a popping habit. When a broad-bill, driving before a strong northwester, darts past, the best plan is to try and fire many feet, even ten or fifteen, ahead of him; and then you will rarely succeed in discharging your piece before he is abreast of the muzzle, and frequently will lag behind him. The aim must be taken on the line of flight, and a little attention will convince you that the bird is up with the sight ere the trigger is fairly pulled. A knowledge of this principle, and an ability to practise it, may be said to be the art of duck-shooting; as in that there are a vast majority of cross shots, and the birds fly rapidly. There is an erroneous idea that the eye must be lowered close down to the breech, in order to have a correct aim; but, while it is apparent if the neck is not bent at all there can be no aim, a slight inaccuracy will not only make no difference, but will give an advantage by throwing the shot high. It will be perceived, on fastening the gun in an immovable position, that the eye may be moved from near one hammer to the other, and the aim altered but a few inches, on an object thirty yards distant--an inaccuracy, considering the spread of shot, which is utterly unimportant.