We shall not stop to dwell on the defects of the bow. The great and insuperable one was its want of power. The strength of a man was the limit of its capacity, and something more was necessary to pierce the ironclad breast of the knight. But, until the invention of gunpowder, it stood at the head of missile engines. When and where gunpowder was invented it is impossible now to ascertain. It seems to be described in the pages of Roger Bacon, while many are of opinion that the returning Crusaders brought it from the east. Certain it is that it had been known in China for many centuries, and applied to the blasting of rocks and other useful purposes, though never to the art of war. But the latter application of it was made by the Europeans almost contemporaneously with their knowledge of its properties, and for war it has been chiefly employed until the present time. The invention of cannon preceded by a century that of small-arms, and it was by a gradual reduction in the size of the former that the latter were produced. Barbour, in his metrical Life of Robert Bruce, says, that cannon were used by Edward III. in his first campaign against the Scots, in 1327. He calls them "Crakys of war." They are also supposed to have been employed by the French in the siege of Puy Guillaume, in 1338. But the first use of them which rests on unimpeachable evidence, and which seems to have been productive of much effect, was at the battle of Cressy, in 1346. It is from this epoch that it is most usual to date the employment of artillery. That day which witnessed the first efficient use of a weapon destined to revolutionize the art of war, also witnessed the most splendid achievements of the archers of England. The bowstrings of the French had become useless by the dampness of the weather, while those of the English, either on account of greater care or the different material of which they were made, were uninjured. The cloth-yard arrows of the English bowmen, directed with unerring skill, made terrible havoc in the ranks of their enemies, while four pieces of artillery stationed on a little hill contributed to their victory. The French troops had none of them ever seen, and most of them never heard of such a weapon, and the terror inspired by the noise and the smoke did more than the balls to hasten their defeat.