ONE:[See larger version] THREE:With the reign of George III. commenced a series of improvements in the manufacture of iron, which have led not only to a tenfold production of that most useful of metals, but to changes in its quality which before were inconceivable. Towards the end of the reign of George II. the destruction of the forests in smelting iron-ore was so great as to threaten their extinction, and with it the manufacture of iron in Britain. Many manufacturers had already transferred their businesses to Russia, where wood was abundant and cheap. It was then found that coke made from coal was a tolerable substitute for charcoal, and, in 1760, the very first year of the reign of George III., the proprietors of the Carron Works in Scotland began the use of pit-coal. Through the scientific aid of Smeaton and Watt, they applied water-, and afterwards steam-power, to increase the blast of their furnaces to make it steady and continuous, instead of intermitting as from bellows; and they increased the height of their chimneys. By these means, Dr. John Roebuck, the founder of these works, became the first to produce pig iron by the use of coal. This gave great fame to the Carron Works, and they received large orders from Government for cannon and cannon-balls. It was some time, however, before enough iron could be produced to meet the increasing demand for railroads, iron bridges, etc.; and so late as 1781 fifty thousand tons were imported annually from Russia and Sweden.We left Wellington occupying his impregnable lines at Torres Vedras during the winter, and Massena occupying Santarem. Buonaparte thought he could suggest a mode of putting down the provoking English general which Massena did not seem able to conceive. After studying the relative situations of the belligerents, he sent word to Soult to make a junction with Massena by crossing the Tagus, and then, as he would be much superior in strength, to continually attack Wellington, and cause him, from time to time, to lose some of his men. He observed that the British army was small, and that the people at home were anxious about their army in Portugal, and were not likely to increase it much. Having thus weakened Wellington, as soon as the weather became favourable they were to make an attack from the south bank of the Tagus. But there were two difficulties to overcome of no trivial character in this plan. Wellington was not the man to be drawn into the repeated loss of his men, and the Tagus was too well guarded by our fleet and by batteries for any chance of taking him in the rear. However, Napoleon sent Massena a reinforcement, under General Drouet, who carried along with him a great supply of provisions: he assembled an army in the north of Spain, under Bessi��res, of seventy thousand men, and Soult moved from Cadiz, leaving Sebastiani to continue the blockade, and advanced to make the ordered junction with Massena. But he deemed it necessary, before crossing into southern Portugal, to take possession of Badajoz. In his advance, at the head of twenty thousand men, he defeated several Spanish corps, and sat down before Badajoz towards the end of February. Could Massena have maintained himself at Santarem, this junction might have been made; but, notwithstanding the provisions brought by Drouet, he found that he had no more than would serve him on a retreat into Spain. He had ten thousand of his army sick, and therefore, not waiting for Soult, he evacuated Santarem on the 5th of March, and commenced his march Spain-ward. Wellington was immediately after him, and the flight and pursuit continued for a fortnight. To prevent Massena from finding a temporary refuge in Coimbra, Wellington ordered Sir Robert Wilson and Colonel Trant to destroy an arch of the bridge over the Mondego, and thus detain him on the left bank of that river[14] till he came up. But Massena did not wait; he proceeded along a very bad road on the left bank of the river to Miranda, on the river Coira. Along this track Massena's army was sharply and repeatedly attacked by the British van under Picton, and suffered severely. Ney commanded the rear-division of the enemy, and, to check the advance of the British, he set fire to the towns and villages as he proceeded, and, escaping over the bridge on the Coira, he blew it up. But before this could be effected, Picton was upon him, accompanied by Pack's brigade and a strong body of horse, and drove numbers of the French into the river, and took much baggage. Five hundred French were left on the ground, and to facilitate their flight from Miranda, which they also burnt, they destroyed a great deal more of their baggage and ammunition. Lord Wellington was detained at the Coira, both from want of means of crossing and from want of supplies; for the French had left the country a black and burning desert. The atrocities committed by the army of Massena on this retreat were never exceeded by any host of men or devils. The soldiers seemed inspired with an infernal spirit of vengeance towards the Portuguese, and committed every horror and outrage for which language has a name. The Portuguese, on the other hand, driven to madness, pursued them like so many demons, cutting off and destroying all stragglers, and shooting down the flying files as they hurried through the woods and hills. The whole way was scattered with the carcases of the fugitives.

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