One of the most remarkable of these houses contains three stories; the first, level with the street, contains the public part of the house, the vestibule, atrium, and tablinum, which opens upon a spacious terrace. Beside these is the peristyle and other private apartments, at the back of which the terrace of which we have just spoken offers an agreeable walk for the whole breadth of the house, and forms the roof of a spacious set of apartments at a lower level, which are accessible either by a sloping passage from the street, running under the atrium, or by a staircase communicating with the peristyle. This floor contains baths, a triclinium, a spacious saloon, and other rooms necessary for the private use of a family. Behind these rooms is another terrace, which overlooks a spacious court surrounded by porticoes, and containing a piscina or reservoir in the centre. The pillars on the side next the house are somewhat higher than on the other three sides, so as to give the terrace there a greater elevation. Below this second story there is yet a third, in part under ground, which contains another set of baths, and, besides apartments for other purposes, the lodging of the slaves. This was divided into little cells, scarcely the length of a man, dark and damp; and we can not enter into it without a lively feeling of the wretched state to which these beings were reduced. A few steps further on the same side, is another house somewhat of the same description, which evidently belonged to some man of importance, probably to Julius Polybius, whose name has been found in several inscriptions. Fragments of richly-gilt stucco-work enable us to estimate the richness of its decoration and the probable wealth of its owner. It will be readily distinguished by its immense Corinthian atrium, or rather peristyle. It has the further peculiarity of having two vestibules each communicating with the street and with the atrium. The portico of the atrium is formed by arcades and piers, ornamented with attached columns, the centre being occupied by a court and fountain. These arcades appear to be enclosed by windows. Square holes, worked in the marble coping of a dwarf wall which surrounds the little court, were perfectly distinguishable, and it is concluded that they were meant to receive the window-frames.