The early aspect of Stonehenge was far more elaborate than as we see it to-day, and the avenues that led to the inner circles and the smaller and outer rings have to a large extent disappeared. The stones are enclosed in a circular earthwork 300 feet across. The outer circle of trilithons, 100 feet in diameter, is composed of monoliths of sandstone originally four feet apart and thirty in number. Inside this circle is another of rough unhewn stones of varying shapes and sizes. Within this again, forming a kind of "holy place," are two ellipses--the outer of trilithons five in number and the inner of blue stones of the same geological formation as the rough stones of the outer circle. Of these there were originally nineteen. [Illustration: PLAN OF STONEHENGE (RESTORED).] Near the centre is the so-called "altar stone," over fifteen feet long; in a line with this, through the opening of the ellipse, is the "Friar's Heel," a monolith standing outside the circles. The larger stones or "sarsens" are natural to the Marlborough Downs, but the unhewn or "blue" stones are mysterious. They are composed of a kind of igneous rock not found anywhere near Wiltshire. A suggestion by Professor Judd is that they are ice-borne boulders accidentally deposited on the Plain during the southward drift of the great ice cap. One of the sarsen stones is stained with copper oxide, and this fact has been taken to point to Stonehenge being erected somewhere in the Bronze Age--that is, not longer ago than 2000 B.C. Excavations about twenty years ago brought to light a number of stone tools, fragments of pottery, coins and bones. Belonging to a long period of time, the finds were inconclusive. It is quite possible that the ring of rough blue stones were erected by a primitive race of stone men and that a continuous tradition of sanctity clung to the spot until, in the time of those heirs and successors of theirs who used bronze weapons and were acquainted with the rudiments of engineering, the imposing temple that we call Stonehenge came into being.