We are told that the first-comers in Crete ground their meal in stone mortars, and that one of the peculiarities of the island was the herring-bone design of their wall buildings. In West Cornwall the stone walls or Giants' Hedges are Cyclopean; farther north, in the Boscastle district, herring-bone walls are common, and in the neighbourhood of St. Just there are numerous British villages wherein the stone mortars are still standing. The formula of independent evolution, which has recently been much over-worked, is now waning into disfavour, and it is difficult to believe otherwise than that identity of names, customs, and characteristics imply either borrowing or descent from some common, unknown source. That the builders of our European tumuli and cromlechs were maritime arrivals is a reasonable inference from the fact that dolmens and cromlechs were built almost invariably near the sea.[20] These peculiar and distinctive monuments are found chiefly along the _Western_ coasts of Britain, the _Northern_ coast of Africa, in the isles of the Mediterranean, in the isolated, storm-beaten Hebrides, and in the remote islands of Asia and Polynesia. By whom was the Titanic art of cromlech-building brought alike to the British Isles and to the distant islands of the Pacific? By what guidance did frail barques compass such terrifying sea space? How were these adequately victualled for such voyages, and why were the mainlands ever quitted? How and why were the colossal stones of Stonehenge brought by ship from afar, floated down the broad waters of the prehistoric Avon, and dragged laboriously over the heights of Oare Hill? Who were the engineers who constructed artificial rocking stones and skilfully poised them where they stand to-day? "To suspend a stupendous mass of abnormous shape in such an equilibrium that it shall oscillate with the most trivial force and not fall without the greatest, is a problem unsolved so far as I know by modern engineers."[21] Who were the indefatigable people who, prior to all record, reclaimed the marshes of the Thames-mouth by an embankment which is intact to-day all round the river coast of Kent and Essex? Who were the horticulturists who evolved wheat and other cereals from unknown grasses and certain lilies from their unknown wild? And who were the philosophers who spun a delicate gossamer of fairy-tales over the world, and formulated the cosmic ideas which are in many extraordinary respects common alike to primitive and more advanced peoples? And why is the symbol generally entitled the Swastika cross found not only under the ruins of the most ancient Troy but also in the Thames at Battersea, and elsewhere from China to Zimbabwe? How is it that Ireland, that remote little outpost of Europe, possesses more Celtic MSS. than all the rest of Celtic Europe put together?