On tracing the line of the City wall on the north side we see how some of the churches, notably St. Giles's and St. Botolph's, have taken a part of the town ditch for the enlargement of their churchyards; near St. Bartholomew's the town ditch is still marked. This ditch caused the Mayor and Council as much worry as the increase of houses, because it was the receptacle for every kind of filth, and its cleansing annually swallowed up a large sum of money. The Fleet River is shown flowing down in the open, and is called the New Canal. It is crossed by a bridge at Holborn and another at Fleet Street. We can mark the sinuous line of the great thoroughfare of Holborn as it was before the viaduct and approaches were made. The Strand outside Temple Bar shows the obstructions which have only finally been removed in our own time. Butcher Row disappeared first in 1813; other streets followed to make way for the new Law Courts, and with the destruction of Holywell Row and the opening of Kingsway the improvements here may be considered complete. To the south are the great houses of Essex and Arundel, with their gardens; their names are preserved in the streets that flow over their sites. Somerset House, the Protector's palace, was then standing, and did not make way for its present representative for another hundred years. The river is covered with wherries, clustered as thickly as ants. It is still the main highway for most people, though there were hackney coaches for hire. There was still only London Bridge by which to get across the river on foot, and the boats were used as ferries. There were tilt-boats, too, as well as the smaller wherries; these ran at stated intervals, like our own omnibuses, and were protected by an awning. Near the Fleet mouth is Bridewell, once a palace, and the scene of the meeting of Parliament, but given by Edward VI. to be a prison. On the east is a blank space, where is now the station of the London Chatham and Dover Railway Co., who purchased it in 1844. The site of St. Paul's was plotted out, but not yet built upon. In fact, the rebuilding of the houses was the first consideration, and was done with remarkable promptness, for in the meantime the poor houseless wretches were camping on Moorfields. The churches and city halls were therefore left to the last; yet even so we may see that, though only eleven years had elapsed since the destruction of the City, about twenty churches had been rebuilt out of the eighty-seven that were destroyed. The picturesque Old London of the gable-ends and overhanging stories was gone, never to return; but gone also was a great deal of rubbish and an insanitariness never afterwards quite so bad. As for the overcrowding, we must see what Sir Walter Besant says: