Southwark Bridge here spans the river. It consists of three cast-iron arches, the centre one wide enough for the Monument to float through cross-ways, and then leave a space of more than thirty feet. The weight of iron employed in its construction was nearly 6000 tons. To look up at the arches from the river, when underneath, recals the chambers built by the old enchanters; so many gloomy cells branch out and run into each other, that they appear marvellous, and compel you to respect the inventive genius of John Rennie, the architect of this wonderful structure, which was erected when railroads were unknown, and a tubular bridge across the Menai Straits undreamed of. These things ought to be borne in mind while looking at the cast-iron bridge of Southwark. College-hill appears to have derived its name from a college founded on it by the famous Whittington, who lived in the time of Chaucer, and who was so many times Lord Mayor of London. The last Duke of Buckingham resided on this hill, but at what period we have not been able to discover. There does not appear to us the remains of any house sufficiently imposing enough to have been his residence, nor any thing extant beyond a court-yard, which is said to have belonged to his princely mansion. Strype says he resided here "upon a particular humour;" and we cannot contradict him, though to us it seems very strange, knowing that the City had at this time ceased, with but few exceptions, to be occupied by the nobility. We know that he sold his house in the Strand in 1672, and it is just probable that he may have resided here about this time; if so, it must then have been a new house, for the Great Fire occurred in 1666; and how such a mansion came to be taken down, and when and for what purpose, we cannot explain. Here we have the Mercers' School, which formerly stood beside the hall and chapel of this ancient company in Cheapside. It is said to be one of the oldest endowed schools in London, and to occupy the ground on which formerly stood "God's Hospital," founded by Whittington, now removed to Highgate, a great improvement on the original situation, considering that there is no longer any "flower-show" in Bucklesbury, and that the old Stocks Market has been removed to make room for the present Mansion House. St. Michael's, College-hill, was rebuilt by Wren; it contains an altar-piece by Hilton, and is remarkable for nothing save that it was made a collegiate church by Whittington's executors, and that the far-famed Lord Mayor is buried here--not forgetting an old poet (Cleveland), of whom we have in another work made honourable mention, for he was the first who called the bee "Nature's confectioner." His description of the ruins of "Old St. Paul's" after the Fire ought to be better known. His hatred of the Roundheads was "right royal."