B. 4.--The race, indeed, which could erect Avebury and Stonehenge, as we may safely say was done by this people,[9] must have possessed engineering skill of a very high order, and no little accuracy of astronomical observation. For the mighty "Sarsen" stones have all been brought from a distance,[10] and the whole vast circles are built on a definite astronomical plan; while so careful is the orientation that, at the summer solstice, the disc of the rising sun, as seen from the "altar" of Stonehenge, appears to be poised exactly on the summit of one of the chief megaliths (now known as "The Friar's Heel"). From this it would seem that the builders were Sun-worshippers; and amongst the earliest reports of Britain current in the Greek world we find the fame of the "great round temple" dedicated to Apollo. But no Latin author mentions it; so that it is doubtful whether it was ever used by the Aryan, or at least by the Brythonic, immigrants. These brought their own worship and their own civilization with them, and all that was highest in Ugrian civilization and worship faded before them, such Ugrians as remained having degenerated to a far lower level when first we meet with them in history. SECTION C. Aryan immigrants--Gael and Briton--Earliest classical nomenclature--British Isles--Albion--Ierne--Cassiterides--Phoenician tin trade _viâ_ Cadiz. C. 1.--How or when the first swarms of the Aryan migration reached Britain is quite unknown.[11] But they undoubtedly belonged to the Celtic branch of that family, and to the Gaelic (Gadhelic or Goidelic) section of the branch, which still holds the Highlands of Scotland and forms the bulk of the population of Ireland. By the 4th century B.C. this section was already beginning to be pressed northwards and westwards by the kindred Britons (or Brythons) who followed on their heels; for Aristotle (or a disciple of his) knows our islands as "the Britannic[12] Isles." That the Britons were in his day but new comers may be argued from the fact that he speaks of Great Britain by the name of _Albion_, a Gaelic designation subsequently driven northwards along with those who used it. In its later form _Albyn_ it long remained as loosely equivalent to North Britain, and as _Albany_ it still survives in a like connection. Ireland Aristotle calls _Ierne_, the later Ivernia or Hibernia; a word also found in the Argonautic poems ascribed to the mythical Orpheus, and composed probably by Onomacritus about 350 B.C., wherein the Argo is warned against approaching "the Iernian islands, the home of dark and noisome mischief." This is the passage familiar to the readers of Kingsley's 'Heroes.'[13]