Abundant evidence is found in accordance with these indications, proving the existence of a long transition-period, during which metallic tools and arms were only very partially introduced, and were manifestly esteemed as rare and precious possessions. To this transition-period we should probably assign the formation of the smaller and most carefully wrought varieties of the stone hammer, with which we may presume the ingenious worker in the newly mastered metals to have wrought, and fashioned into shape, many of the rude but massive gold ornaments found in the tumuli. From the number of these relics of the precious metals which have been discovered, we are irresistibly led to the conclusion that gold must have been much more abundant at that remote era than it has been within the period of authentic history. Nor is it difficult to account for such a state of things. Though usually found in very small quantities, gold is well known as one of the most widely diffused of all the metals; and the clay slate which frequently forms the depository of gold, silver, and copper, exists in great abundance throughout the Highlands. In the Leadhills of Scotland considerable quantities of gold have been procured at no very distant period, while numerous allusions suffice to shew its greater abundance in former times.[247] In the twelfth century the Abbey of Dunfermline received a grant from David I. of the tithe of all the gold produced by the surrounding districts of Fife and Forthrev;[248] and even in the sixteenth century the Laird of Merchiston is said to have wrought gold in the Pentland Hills.[249] In the remoter era, however, to which we now refer, when the rude Caledonian was learning, for the first time, to fashion his weapons and tools of bronze, and to substitute the golden torc and armilla for the necklace of perforated shells or stone and amber beads, we are justified in assuming from analogy that in many of the channels of the Scottish mountain streams,--amid the strata of which the ore has been found,--not only the gold dust, but pure masses of native gold would be occasionally discovered, and wrought with no better tools than the stone hammer and anvil into the personal ornaments of distinguished leaders or priests. Strabo, in referring to the great mineral wealth of Spain, which made it to the ancients what America became to the Spaniards long after their native mineral treasures were exhausted, remarks,--"In no country are gold, silver, copper, and iron, so abundant or of such fine quality; even the rivers and mountain streams bring down gold in their beds, which is found in their sands." Yet such a description is now as little applicable to Spain as to Scotland. But more recent and conclusive evidence exists. Much sensation was excited in 1795 by the discovery of gold dust in the bed of the brook Ballinasloge, a feeder of the Avonmore river, about seven miles west from Arklow, county Wicklow. The stream is formed