Beside the impluvium stood a machine, now in the National Museum, for heating water, and at the same time warming the room if requisite. The high circular part, with the lid open, is a reservoir, communicating with the semi-circular piece, which is hollow, and had a spout to discharge the heated water. The three eagles placed on it are meant to support a kettle. The charcoal was contained in the square base. In the preceding pages we have taken indiscriminately, from all quarters of the town, houses of all classes, from the smallest to the most splendid, in the belief that such would be the best way of showing the gradations of wealth and comfort, the different styles of dwelling adopted by different classes of citizens, in proportion to their means. It would, however, be manifestly impossible so to classify all the houses which contain something worthy of description, and we shall, therefore, adopt a topographical arrangement as the simplest one, commencing at the Gate of Herculaneum, and proceeding in as regular order as circumstances will permit through the excavated part of the town. Most of the houses immediately about the gate appear to have been small inns or eating-houses, probably used chiefly by country people, who came into market, or by the lower order of travelers. Immediately to the right of it, however, at the beginning of the street called the Via Consularis, or Domitiana, there is a dwelling of a better class, called the House of the Musician, from paintings of musical instruments which ornamented the walls. Among these were the sistrum, trumpet, double flute, and others. Upon the right side of the street, however, the buildings soon improve, and in that quarter are situated some of the most remarkable mansions, in respect of extent and construction, which Pompeii affords. They stand in part upon the site of the walls which have been demolished upon this, the side next the port, for what purpose it is not very easy to say; not to make room for the growth of the city, for these houses stand at the very limit of the available ground, being partly built upon a steep rock. Hence, besides the upper floors, which have perished, they consist each of two or three stories, one below another, so that the apartments next the street are always on the highest level. Those who are familiar with the metropolis of Scotland will readily call to mind a similar mode of construction very observable on the north side of the High Street, where the ground-floor is sometimes situated about the middle of the house.