THREE:When Washington arrived at Boston, on the 15th of June, he found the English army augmented to ten thousand by fresh forces, under Generals Burgoyne, William Howe, the brother of Lord Howe, and Henry Clinton. The American troops consisted of twenty thousand militia and volunteers, still in a most confused condition, extended over a line of twenty miles in length, that only required an attack of five thousand men, led by a general of courage and ability, to be thoroughly beaten. They were, moreover, greatly deficient in powder and other necessaries. But the English generals lay as if there were no urgent need of action. Had a sudden movement on the Neck been made from Boston, five hundred men could have broken and dispersed the Americans nearest to that position before the other ill-trained troops, some of them at great distances, could have come up; and they might have been easily defeated in detail by the simultaneous efforts of four spirited generals and ten thousand efficient soldiers. But lethargy seemed to have seized on Gage, and to have also infected his coadjutors.Half the London bridges were built, or rebuilt, during this period. Waterloo Bridge was begun in 1811, and completed by its designer and architect, John Rennie, on the 18th of June, 1817, having cost upwards of a million sterling. It is not only the longest of the Thames bridges, but was pronounced by Canova the finest bridge in the world, and is justly universally admired. Rennie built Southwark Bridge, an iron one, at a cost of eight hundred thousand pounds, and completed it in 1819, its erection occupying five years. Sir John Rennie, his son, built the new London Bridge from the designs of his father; but this was not begun till six years after the death of George III., nor finished till 1831, at a cost of five hundred and six thousand pounds.