We may here add a few observations, derived, as well as much of the preceding matter, from the valuable work of Mazois, relative to the materials and method of construction of the Pompeian houses. Every species of masonry described by Vitruvius, it is said, may here be met with; but the cheapest and most durable sorts have been generally preferred. Copper, iron, lead, have been found employed for the same purposes as those for which we now use them. Iron is more plentiful than copper, contrary to what is generally observed in ancient works. It is evident from articles of furniture, etc., found in the ruins, that the Italians were highly skilled in the art of working metals, yet they seem to have excelled in ornamental work, rather than in the solid and neat construction of useful articles. For instance, their lock-work is coarse, hardly equal to that which is now executed in the same country; while the external ornaments of doors, bolts, handles, etc., are elegantly wrought. The first private house that we will describe is found by passing down a street from the Street of Abundance. The visitor finds on the right, just beyond the back wall of the Thermæ Stabianæ, the entrance of a handsome dwelling. An inscription in red letters on the outside wall containing the name of Siricus has occasioned the conjecture that this was the name of the owner of the house; while a mosaic inscription on the floor of the prothyrum, having the words SALVE LUCRU, has given rise to a second appellation for the dwelling. On the left of the prothyrum is an apartment with two doors, one opening on a wooden staircase leading to an upper floor, the other forming the entry to a room next the street, with a window like that described in the other room next the prothyrum. The walls of this chamber are white, divided by red and yellow zones into compartments, in which are depicted the symbols of the principal deities--as the eagle and globe of Jove, the peacock of Juno, the lance, helmet and shield of Minerva, the panther of Bacchus, a Sphinx, having near it the mystical chest and sistrum of Isis, who was the Venus Physica of the Pompeians, the caduceus and other emblems of Mercury, etc. There are also two small landscapes.