For my part, granted that this people bore the name Iveri, changed afterwards into the adjectival form Iverni, I see no serious difficulty in supposing that this name was a local variant of Iberi, the name by which the people of Spain were known to the ancient Greeks and Romans. Authorities on Irish archæology are agreed that the Early Stone Age is not exemplified in the most ancient remains of human occupation that have been discovered in Ireland. The explanation for this is supplied by the geologists. Some thousands of years ago, the conditions of perpetual snow and ice that at present prevail in the Arctic regions extended much farther into the temperate zones. The northern parts of Europe were covered with perpetual ice. Ireland lay entirely within this glacial zone. The southern limit of the ice ran through the south of England and eastward across the Continent. The time during which this southward extension of ice lasted is called the Glacial Period. Already before that time, Europe was inhabited by man, and the Early Stone Age or Palæolithic Age is held to have preceded the Glacial Period. The condition of Ireland during that period was like the present condition of Greenland, under a heavy covering of ice formed by the accumulation of snow. By its own weight the ice kept moving from the mountains into the valleys and plains, and from the higher land level into the surrounding seas. Under its moving action, the solid rock-formation of the mountains was ground down and rounded off and scooped into hollows, and great sheets and ridges of stones, gravel, sand and boulder-clay were accumulated on the slopes and low grounds. It is evident that any traces of human life and habitation that may have existed before this process were not likely to be found after it. The consequence is that the earliest traceable population of Ireland was Neolithic, _i.e._, belonged to the Late Stone Age. By the Stone Age is meant that time in which the use of metals was still unknown, and in which the most durable material of implements used by men was stone. Needless to say, they also used wood, bone, and any other material that came to hand. The Late Stone Age is distinguished from the Early Stone Age by the use of polished and finely shaped stone implements.