On the level plot of ground on the top of the bank which rises behind Water-street, the city of Philadelphia was originally laid out, and it was intended by the founder that no houses should have been erected at the bottom of it; however, as there was no positive law to this effect, the convenience of the situation soon tempted numbers to build there, and they are now encroaching, annually, on the river, by throwing wharfs farther out into the stream. In another respect also the original plan of the city was not adhered to. The ground allotted for it was in the form of an oblong square, two miles in length, reaching from the river Schuylkill to the Delaware, and one mile in breadth. Pursuant to this scheme, the houses were begun on the Delaware side; but instead of having been carried on towards the Schuylkill, the current of building has kept entirely on one side. The houses extend for two miles nearly along the Delaware, but, on an average, not more than half a mile towards the Schuylkill: this is to be attributed to the great superiority of the one river over the other. All the houses built beyond the boundary line of the oblong square are said to be in the “Liberties,” as the jurisdiction of the corporation does not extend to that part of the town. Here the streets are very irregularly built, but in the city they all intersect each other at right angles, according to the original plan. The principal street is one hundred feet wide; the others vary from eighty to fifty. They are all tolerably well paved with pebble stones in the middle; and on each side, for the convenience of passengers, there is a footway paved with red brick. The houses within the limits of the city are for the most part built of brick; a few, and a few only, are of wood. In the old parts of the town they are in general small, heavy, and inconvenient; but amongst those which have been lately erected, many are to be found that are light, airy, and commodious. In the whole city, however, there are only two or three houses that particularly attract the attention, on account of their size and architecture, and but little beauty is observable in the designs of any of these. The most spacious and the most remarkable one amongst them stands in Chesnut-street, but it is not yet quite finished. At present it appears a huge mass of red brick and pale blue marble, which bids defiance to simplicity and elegance. This superb mansion, according to report, has already cost upwards of fifty thousand guineas, and stands as a monument of the increasing luxury of the city of Philadelphia.