These Flint men were succeeded by other races of New Stone men who found that they could manufacture their necessary tools out of the boulders embedded in the drift and boulder-clay. The men who dug up the knives and scrapers of Alderley found near Mottram Common a heap of small boulders carefully placed in a pit dug in the ground and clearly selected for some useful purpose. For out of these stones were to be cut and shaped stone hammer-heads with which they learned to crush copper ore and axe-heads to cut down trees. Some of the hammer-heads themselves have been found in this locality, and they are made of a stone similar to that of the unbroken boulders. The stone 'celt' or axe-head in Vernon Park Museum shows that they were improving in their skill and workmanship, for their tools were no longer chipped into their required shape but ground with hard mill-stones and afterwards smoothed and polished. Afterwards, as you may see from the specimen in the Grosvenor Museum, which has a hole cut through it, the New Stone men learned how to fit handles to their axe-heads. In the course of time these primitive dwellers learned to tame and train animals for their service and use. They were protected from attack by wild beasts by circles of piled stones or raised earth covered with turf. Traces of these circles have in recent years been found at Alderley Edge, but they have been mostly levelled for agricultural purposes. They also taught themselves the art of pottery, making rough jars and urns of sun-dried clay and sand, jars wherein to store their water, and urns in which to place the remains of their dead. One of these urns, dug up at Stretton, may be seen in the Warrington Museum. The Stone men were succeeded by tribes of an entirely different race called Celts. The Celts drove out the earlier inhabitants from their Cheshire homes, compelling them to seek refuge in Wales and Ireland. They came not all at once but in successive waves, the earliest arrivals being the Goidelic or Gaelic Celts, who in their turn were ousted by the Brythonic Celts, from whom the name of Briton is derived. These are the ancestors of the Welsh nation. The Brythons, or Britons as we may now call them, were a more intelligent and civilized race than any that had hitherto dwelt in the land. They were a pastoral people, and brought with them great herds of cattle, as well as horses and dogs. They could spin and sew, making their spindles and needles of bone or horn, and grew corn, which they ground with hand-mills.