Contrary to another cherished belief, the Sarsen Trilithons were erected first, followed by the foreign stones. The building of the group was continuous and no gap separates the Trilithon from the foreign upright. Of this abundant ocular proof was forthcoming in 1901, when the foundations of the great Trilithon were laid bare, and the leaning upright restored to its original perpendicular position. When the ground was opened it was found that each upright had been differently bedded in the earth--and for a very good reason. The one was twenty-nine feet eight inches long, while the other was only twenty-five feet. Obviously they were the two finest "grey wethers" obtainable in the flock, and because of that, they were set aside for the most prominent place in the enclosure. The master builder decided that the height of this central Trilithon should be the equivalent of twenty-one feet at the present day. Therefore it was necessary to bed one stone deeper than the other, in order that their two summits should be level to receive the lintel, or impost. One stone, therefore, was sunk to a depth of four feet, while the other extended downwards eight feet three inches. To compensate for the lack of depth in the shorter stone, its base was shaped into an irregular projecting boss to give it a greater bearing area. It was decided to raise the larger stone first, and the foundation was dug as follows: A slanting trench was cut with the deer's horn picks through the earth and chalk, having at its deeper end a perpendicular chalk face against which the Sarsen could rest when upright. Rubble and chalk were cleared away, and the stone carefully slid down the plane to its foundation. To raise it, now that its base rested against a solid wall of chalk, was not a great matter. The same ropes of hide and tree trunks which had served for its transport would again have come into play. Slowly it would be levered up, and packings or wedges of wood or stone inserted. Thus inch by inch, probably, it rose higher and higher, strutted up, perhaps, by strong saplings as it reared its head above the busy crowd of builders. Blocks of Sarsens were packed beneath it to equalise the bearing, and then the excavation was filled in with chalk and rubble, which doubtless was well rammed down and consolidated with the big sixty-pound mauls. Among the packing of chalk and rubble were found a considerable number of the rough implements already referred to. [Illustration: The central Entrance of Stonehenge. Looking S.W.]