had been achieved; and some idea of my perilous situation broke upon me, when I saw some of my friends beneath, waving their handkerchiefs and looking up with astonishment, as we sat perched upon the top, which is not more than six feet square. The apex stone is off, and it now consists of four outer slabs, and one in the centre, which is raised up on the end and leans to the eastward. I do not think human hands could have raised it from its bed, on account of its size, and the confined space they would have to work in. I am inclined to think the top was struck by lightning, and the position of the stone thus altered by it. The three of us had just room to sit upon the place. The descent, as might be expected, was much more dangerous, though not so difficult. The guides tied a long sash under my arms, and so let me slide down from course to course of these coverings of stones, which are of a yellowish limestone, somewhat different from the material of which the steps are composed, and totally distinct from the rock at the base, or the coating of the passages." EGYPTIAN OBELISKS. Obelisks belong to the oldest and most simple monuments of Egyptian architecture, and are high four-sided pillars, diminishing as they ascend, and terminating in a small pyramid. Herodotus speaks of them, and Pliny gives a particular account of them. The latter mentions king Mesphres, or Mestres, of Thebes, as the first builder of obelisks, but does not give the time; nor is this king noticed either by Herodotus or Diodorus. It is probable that these monuments were first built before the time of Moses, at least two centuries before the Trojan war. There are still several obelisks in Egypt; there is one erect, and another fallen at Alexandria, between the new city and the light-house; one at Matarea, among the ruins of old Heliopolis; one in the territory of Fayoum, near ancient Arsinoe; eight or ten among the ruins of Thebes; the two finest at Luxor, at the entrance of the temple, &c. These obelisks, exclusively of the pedestals, are mostly from 50 to 100 feet high, and of a red polished granite (sienite); a few of the later ones are of white marble and other kinds of stone. At their base, they commonly occupy a space of from 41/2 to 12 feet square, and often more. Some are adorned on all sides, and some on fewer, with hieroglyphics cut in them, sometimes to the depth of two inches, divided into little squares and sections, and filled with paint: sometimes they are striped with various colors. Some are entirely plain and without hieroglyphics. The foot of the obelisk stands upon a quadrangular base, commonly two or three feet broader than the obelisk, with a socket, in which it rests. They were commonly hewn out of a single stone, in the quarries of Upper Egypt, and brought on canals, fed by the Nile, to the place of their erection.