Stonehenge stands about 440 feet above the sea-level. The outer circle measures 308 feet in circumference, and is supposed to have been formed originally of thirty upright stones, seventeen of which are still standing, and the remains of nine others are to be found fallen to the ground. These stones formerly stood 14 feet above the surface of the ground, but now are of different heights. Their breadth and thickness also vary: the former averaging 7 feet, the latter 3½. The stones were fixed in the ground at intervals of 3½ feet, connected at the top by a continuous line of thirty imposts forming a corona or ring of stone at a height of 16 feet above the ground, and were all squared and rough hewn, and cleverly joined together. The uprights were cut with knobs or tenons, which fitted into mortice holes hewn in the undersides of the horizontal stones. About 9 feet within this peristyle was the “inner circle,” composed of diabase obelisks; within this, again, was the “great ellipse,” formed of five, or, as some think, seven trilithons of stones, each group consisting of two blocks placed upright and one crosswise. These structures rose progressively in height from N.E. to S.W., and the loftiest and largest attained an elevation of 25 feet. Lastly, within the trilithons was the “inner ellipse,” consisting of nineteen obelisks of diabase. Within the inner ellipse we find the Altar Stone. At the present moment, there remains of the outer circle or peristyle sixteen uprights and six imposts; of the inner circle, seven only stand upright of the great ellipse—there are still two perfect trilithons and two single uprights. The Duke of Buckingham, in his researches in 1620, is said to have caused the fall of a trilithon. He was at Wilton in the reign of James I., and he “did cause the middle of Stonehenge to be digged, and under this digging was the cause of the falling down or recumbency of the great stone there, twenty-one foote long.” “In the process of digging they found a great many horns of stags and oxen, charcoal batter-dishes (?), heads of arrows, some pieces of armour eaten out with rust, bones rotten, but whether of stagge’s or men they could not tell.” In 1797, on a rapid thaw succeeding a severe frost, another trilithon fell; of the inner ellipse, there are six blocks in their places; and in the centre remains the so-called Altar Stone. In Sir R. C. Hoare’s “History of Wiltshire,” he mentions that Inigo Jones observed a stone, which is now gone, in the inmost part of the cell, appearing not much above the surface of the earth and lying towards the east, four feet broad and sixteen long, which was his supposed Altar Stone. Also “Philip, Earl of Pembroke (Lord Chamberlayne to King Charles I.), did say ‘that an altar stone was found in the middle of the area here, and that it was carried away to St. James’s.’” The entrance to Stonehenge faced the N.E., and the road to it, “Viâ Sacra,” or avenue, can be traced by banks of earth.