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FORE:Sir John F. W. Herschel, son of Sir William Herschel, conversant with almost every branch of science, also devoted himself with remarkable success to the cultivation of sidereal astronomy. He evinced very early a taste for mathematics, but did not devote himself to astronomy until after his father's death in 1822. He then gave himself up to it without reserve. At that period the Southern Hemisphere was to astronomers little more than an unknown region. For the purpose of exploring it, he visited the Cape of Good Hope in 1834, where, making use of his father's method, he continued his observations for more than four years, examining with great care, among other things, the nebul? and double stars. On his return to Europe, he gave the results of his labours to the world in a work of deep interest, and of the highest importance; and the value of the services he had rendered to science was recognised, not only by the scientific world, but by his Sovereign also, who created him a baronet. After he was appointed Master of the Mint, in 1850, he took no further part in practical astronomy, but he published many excellent works, not only on that subject, but on science generally; and he displayed a thorough acquaintance with natural history, the belles-lettres, and the fine arts, and translated a portion of the "Iliad." This great astronomer and mathematician died in May, 1871. Lord Rosse's labours to improve the telescope commenced about 1828, and continued unremittingly until 1844. His masterpiece was of six feet aperture and 54 feet in focal length.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.