The procession then forms again, and the party proceeds to whatever place outside the walls may contain the family tomb of the Silii. No burial is allowed within the city proper, and for our purposes we will assume that the place is distant nearly a mile along the Appian Way. We will assume also that Silius is to be cremated, and not simply buried in a coffin or a marble sarcophagus. Few persons of the higher classes, except certain of the Cornelii, are buried at this date, although there is nothing in law or custom to prevent the choice. There exists no "crematorium," and the Silii are regularly burned at their own sepulchral allotment beside the "Queen of Roads." If you were with the procession on this day you would find yourself before one of an almost continuous chain of monuments, built in all manner of shapes and sizes--such as great altars, small shrines, pyramids (like that of Cestius on another road), or round towers like the beautiful tomb of Caecilia Metella. The exterior of these structures is often adorned with commemorative or symbolic carvings, and the inside, which may be wholly above the surface or partly sunk beneath--is a chamber surrounded by niches, in which are placed the urns containing the ashes of the dead. Perhaps an illustration of the present state of the "Street of Tombs" at Pompeii will afford some notion, although the sepulchres of that provincial place by no means matched those upon the various roads outside the Roman gates. Often the monumental chamber stands somewhat back from the road, leaving space for a large semicircular seat of stone open to public use, its back wall being inscribed with some statement of honour to the family. Round the sepulchre--"where all the kindred of the Silii lie" is a space of ground, planted with shrubs and trees, and surrounded by a low wall. Somewhere near, on an open level, the funeral pile has been built of pine-logs, with the interstices stuffed with pitch, brushwood, or other inflammable material. It is natural that the pyre should take the shape of an altar and that cypress branches should lean against the sides.