The Syenite granite was very hard, and capable of taking a high polish. The carving is very beautifully executed, and the hieroglyphs rise from a sunken surface, in a style known as "incavo relievo." In this mode of carving the figures never project beyond the surface of the stone, and consequently are not so liable to be chipped off as they would have been had they projected in "high relief." The hieroglyphs are always arranged on the obelisks with great taste, in long vertical columns, and these were always carved after the obelisk was placed in its permanent position. The hewing, transport, hoisting, and carving of such a monolith was a gigantic undertaking, and we are not therefore surprised to learn that "the giant of the obelisk race," now in front of St. John Lateran, Rome, occupied the workmen thirty-six years in its elaboration. The chief obelisks known, taking them in chronological order, are as follows:--Three were erected by Usertesen I., a monarch of the XIIth dynasty, who lived about 1750 B.C. He is thought by some to be the Pharaoh that promoted Joseph. Of these three obelisks one still stands at Heliopolis in its original position, and from its great age it has been called "the father of obelisks." It is sixty-seven and a-half feet high, and is therefore about a foot shorter than the London obelisk. Its companion is missing, and probably lies buried amid the ruins of the sacred city. The third is at Biggig, in the Fyoom, and, unfortunately, is broken into two parts. Its shape is peculiar, and on that account Bonomi and others say that it cannot with propriety be classed among the obelisks. After the XIIth dynasty Egypt was ruled for many centuries by monarchs of Asiatic origin, called the Hykshos or "Shepherd Kings." During the rule of those foreigners it does not appear that any obelisks were erected. Thothmes I., of the XVIIIth dynasty, erected two in front of the Osiris temple at Karnak. One of these is still standing, the other lies buried by its side. Hatasu, daughter of Thothmes I., and queen of Egypt, erected two obelisks inside the Osiris temple of Karnak, in honour of her father. One, still standing, is about one hundred feet high, and is the second highest obelisk in the world. Its companion has fallen to the ground. According to Mariette Bey, Hatasu erected two other obelisks in front of her own temple on the western bank of the Nile. These, however, have been destroyed, although the pedestals still remain.